abstract:"Girl You Know It's True" is a song written by Bill Pettaway, Sean Spencer, Kevin Lyles, Rodney Holloman, and Ky Adeyemo.Milli Vanilli: Baby Don't Forget My Number They recorded it as Numarx, but the song failed to make much impact until it was covered by Milli Vanilli and released as their lead single from the album Girl You Know It's True.