Hair Today, Gone Tomorrow is the title of several cartoons:
Season 4, Episode 40 of The Harveytoons Show Season 11, Episode 211 of King of the Hill Season 2, Episode 7 of Shaun the Sheep "Hair Today, Gone Tomorrow", a 2007 short cartoon from Foster's Home for Imaginary Friends Season 1, Episode 19 of Middlemost Post
Season 1, Episode 1 of Dennis The Menace