"Bye Bye" is a song recorded by American singer-songwriter Mariah Carey for her eleventh studio album E=MC² (2008). She co-wrote the song with its producers Mikkel S. Eriksen, Tor Erik Hermansen and Johntá Austin. The pop and R&B track features a piano and keyboard-driven melody. Lyrically, it is a dialogue in between Carey and her deceased father throughout the verses, and a universal salute to departed loved ones on the chorus. The song was released as the second single from E=MC² on April 22, 2008, by Island Records.

"Bye Bye" received generally positive reviews, with many critics considering it a highlight from the album. It peaked at number 19 on the US Billboard Hot 100. In other countries, the song achieved relatively weak charting, and reaching the top-ten in New Zealand; and the top-fifty in Canada, Ireland, Slovakia, and the United Kingdom.

"Bye Bye" was performed on few live televised appearances, in comparison to the large promotional boost given to "Touch My Body". Carey first performed the song on T4, followed by Good Morning America and The Oprah Winfrey Show. Carey performed "Bye Bye" for the final time on the seventh season of American Idol, where she was featured as a mentor for the top-seven week. The song's accompanying music video was directed by Justin Francis on the island of Antigua in the Caribbean. The video features behind-the-scenes footage of Carey and her then fiancé Nick Cannon, the singer promoting the album in the United Kingdom, as well as photos of several of Carey's close friends, family and past collaborators.

Background 'Bye Bye', appears to be about her late father, Alfred Roy, who died of cancer in 2002. Mariah reminisces about the too-little time she shared with her mostly absent father and regrets how as a child, she didn't understand why he failed to show up sometimes to see her after he and her mother divorced when she was 3. But mostly Mariah regrets that he 'never got a chance to see how good I've done / And you never got to see me back at #1'. This confessional moment doesn't last long, since she extends this song about death to be for anybody "who just lost somebody." —Jennifer Vineyard, MTV News.

During the conception of her ninth studio album Charmbracelet in 2002, Carey's father, Alfred Roy, was diagnosed with cancer. After divorcing from Patricia, Carey's mother, when the singer was only three, he kept only limited contact with her throughout the years, as Patricia continuously moved due to their poverty. During this period of Carey's life, when she was just recovering from a breakdown and career slouch, she began reconnecting with her father during his short time in hospital care. In a song titled "Sunflowers for Alfred Roy", present on Charmbracelet, Carey refers to a moment she shared with him on his death-bed. Critics described the song as "the album's most lyrically personal song" and appreciated its simple piano accompaniment, while Carey retells of a visit she shared with her father in his hospital room, "Strange to feel that proud, strong man / Grip tightly to my hand."

After the release of Charmbracelet and its succeeding album, The Emancipation of Mimi (2005), Carey began working on material for her eleventh studio effort, the yet untitled E=MC² (2008). It was one of the most anticipated albums of 2008, with many critics weighing their opinions on whether Carey would be able to deliver significant success, following her achievements with The Emancipation of Mimi. "Bye Bye" was released as the album's second single, following "Touch My Body", in April 2008. Upon its release, Carey recalled in an interview with MTV: "Sometimes when I'm writing a song, it does come from such a raw place that I'm actually crying while writing it," Mariah admitted. Her second single, a tribute to her late father, is also meant to reach anyone else who has suffered a loss of a loved one. "Sometimes I hear it and feel that this is going to touch a lot of people, and that's why it's important that no matter what's ever happened to me over my career, that I stay the course and continue to write and try and reach people who need." Anyone who manages to do the reverse, and touch Mariah with one of their songs, "I'm indebted to them forever."

Composition

"Bye Bye" is a slow-tempo "inspirational power ballad", which is influenced by R&B and pop music genres. The song is built on an understated and simple piano-driven melody, that is decorated with a soft bass-line. Written by Carey, Mikkel S. Eriksen, Tor Erik Hermansen and Johntá Austin, and produced by the former three, the song drew comparisons to several of Carey's previous musical arrangements featured in both "We Belong Together" and "Don't Forget About Us". According to the sheet music published at Musicnotes.com by Sony/ATV Music Publishing, "Bye Bye" is set in common time with a tempo of 68 beats per minute. It is composed in the key of B-flat major, with Carey's vocal range spanning from the low-note of F3 to the high-note of F6 in whistle register, and F5 in chest voice. The song follows in the chord progression of Bm7–Am7–Gmaj7.

Lyrically, the song was described by critics as a "larger than life anthem", and an "inspirational lighter-in-the-air ballad", where Carey remembers both her father, as well as any lost loved ones. "Bye Bye" begins with an understated chorus, then working into the first verse, in which Carey retells her childhood, and her relationship with her father years ago: "As a child there were them times / I didn't get it, but you kept me alive / I didn't know why you didn't show up sometimes / And its more than saying 'I miss you' / But I'm glad we talked through / All them grown full things separation brings / You never let me know it, you never let it show". Then, the pre-chorus continues describing Carey's emotions in the present, "And everyday life goes on / I wish I could talk to you for a while", and how the loss of her father still affects her day-to-day life.

While the verses are dedicated to him, the chorus was written in a third-person point of view, for her fans: "This is for my peoples who just lost somebody / Your best friend, your baby, your man or your lady / Put your hand way up high / We will never say bye / Mamas, daddies, sisters, brothers, friends and cousins / This is for my peoples who lost their grandmothers / Lift your hands to the sky / Because we won't ever say bye bye". As Carey sings the second chorus, she reverts to the singular conversation with her deceased father, however now revisiting 2005, "And you never got a chance to see how good I've done / And you never got to see me back at No. 1", referencing her return to the top of music with The Emancipation of Mimi. The song does not feature a bridge, instead repeating the chorus twice, once in the same key as the rest of the song, while the other in a raised octave. During the last chorus, Carey's voice is doubled, with her regular tone voice singing softly over the piano chords, while her more prominent and higher pitched vocals are laid over it.

Critical reception

"Bye Bye" received mostly positive reviews from music critics, and was heavily speculated to have become Carey's 19th number-one single on the Billboard Hot 100. Many reviewers complimented its simple and understated musical arrangement and personalized lyrics, while some felt the song was too simple for an artist of Carey's stature. Jeffrey Mitchell from The Hollywood Reporter described it as a "high point" on the album, and wrote "Mariah softly and sweetly lamenting the loss of any kind of loved one on the truly touching 'Bye Bye'. Mitchell concluded his review put stock in the song's success, and ended with "Thankfully, it looks like we won’t be saying “bye” to Mariah for a long time." An anonymous journalist writing in for MTV UK called "Bye Bye" a "tear jerking ode to people who have passed away", and assumed it would "have reality pop contestants singing away for decades to come!" The Houston Chronicles Goey Guerra highlighted the song as "truly trademark Mimi", and described it as "a lighters-and-hands-in-the-air tribute to deceased loved ones". Dan Hinkley of Daily News branded it "the album's most potentially personal song", and assured it would become Carey's 19th chart-topping single in the United States. The song received positive response from both Rolling Stones Christian Hoard and Yahoo! Music writer Dann Gennoe, who describes the track as a "piano-based big-voiced" and "lighter-friendly" ballad. In his review of E=MC², a writer from the Los Angeles Times described the song's lyrics and production in detail: When Carey tries to open up a bit more, her sentiments are the equivalent of a Hallmark Precious Moments figurine. In a ballad 'Bye Bye', Carey isn't taking chances, designing the lyrics for mass appeal by dedicating them to anyone who ever lost somebody, be it 'your best friend, your baby, your man or your lady'. But Carey gracefully pulls off the universality of the lyrics, and the tune will likely be a massive hit. A columnist from the British newspaper New! described "Bye Bye" as their "favorite track" and wrote, "the delicious 'Bye Bye' is a classic slushy Mariah ballad, with a swoonsome chorus." Jonathan Reyes from Rap-Up felt the track would get listeners "teary eyed", and due to it being a "song everyone can relate too", assure it would become Carey's next number-one single. While ABC News writer, Steve Jones, described how "Bye Bye" packed the bum with "an emotional wallop", The Washington Posts Freedom De Luc compared it heavily to "Don't Forget About Us", Carey's 2005 single. De Luc wrote how both shared similar piano instrumentation, however different lyrical settings; "Don't Forget About Us" finds Carey playing a "broken-hearted lover", while "Bye Bye" an "inspirational song that comes with its own set of suggested demographics and instructions." Some reviewers felt the song was a sub-par effort from an artist of Carey's stature, with many describing it as unoriginal and not a good follow-up single to "Touch My Body". Entertainment Weeklys Margeaux Watsman felt "Bye Bye" was an "odd choice" for a second single, and called it "somber edgy". Nick Levine from Digital Spy described the track as a "shmaltzy ballad", while an anonymous VH1 critic wrote "with the “We Belong Together” sonic template and lyrics tailored appeal to everyone on such a basic level seems like too easy of a combination for someone as established as Mimi. This one's like insurance – in case nothing else is a hit, here's a sure-shot. But ultimately, it turns out that the album is too good for that."

Chart performance "Bye Bye" served as the second single from the album E=MC². Though released in the United States, the United Kingdom, Australia and other select parts of Europe, the song was not sent to radio stations in countries like the Netherlands, France, Norway and Switzerland, where "I'll Be Lovin' U Long Time", the album's third official single, was released instead. "Bye Bye" debuted at number twenty-three on the Billboard Hot 100 as the "Hot Shot Debut", selling 60,000 downloads. Following her performance of the song on American Idol and The Oprah Winfrey Show, it eventually peaked at number nineteen on the Hot 100, and at number thirty-three on the Billboard Hot R&B/Hip-Hop Songs. The track eventually peaked at number thirty-four on the Canadian Hot 100, and stayed within the chart for a total of twelve weeks. As of February 2014, "Bye Bye" had sold 598,000 copies in the United States.

On the main chart in Europe, "Bye Bye" peaked at number eighty-four on the European Hot 100. It debuted and peaked at number seventy in Germany, and debuted at number eighty-eight on the UK Singles Chart. Six weeks later, on July 5, 2008, the song peaked at number thirty, due to the release of the song's music video. In Asia, "Bye Bye" charted on the Japan Hot 100, peaking at number seventy-three.