"Mighty 'O'" (also written "Mighty "O"", and without apostrophes around the O, as "Mighty O") is the first single released from OutKast's sixth studio album, Idlewild. The single was only released in the United States, and is one of only three songs from the album in which both members of OutKast appear together. The other two are "Hollywood Divorce" and "PJ & Rooster". The single peaked at number 77 on the Billboard Hot 100 chart.