"Big Mistake" is a song by the American singer-songwriter and former Chicago performer Peter Cetera. Released as a single in late 1986 from Cetera's second studio album, Solitude/Solitaire, "Big Mistake" became the album's third single to reach the charts, peaking at No. 61 on the Billboard Hot 100. It was composed by Cetera and Amos Galpin and produced by Michael Omartian.

Personnel Peter Cetera – vocals, bass Michael Omartian – keyboards Dann Huff – guitars Jeff Porcaro – percussion Erich Bulling – synthesizers, drum programming, Yamaha QX-1 computer Willie Alexander – Fairlight programming

Charts Chart (1987)PeakpositionUS Cashbox55

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