"If Only You Knew" was a single written and produced primarily by Dexter Wansel and Cynthia Biggs for American singer Patti LaBelle's sixth solo album, I'm in Love Again. It was released as the album's official first single in 1983, spending four weeks at number one on the U.S.R&B charts during January and February 1984, and reached number forty-six on the Billboard Hot 100, marking her first crossover pop hit.