Andre' Nathaniel Deyo, better known by his stage name mrDEYO, is an American R&B singer and songwriter best known for writing "Jenny From The Block" for Jennifer Lopez and subsequently writing the book "Jenny & Becky From The Block" after the release of "Becky From The Block" by Becky G. He has been signed to a publishing deal with Sony/ATV Music Publishing since 2002.

"Jenny from the Block" is a song by American singer Jennifer Lopez, which features American rappers Jadakiss and Styles P, both members of the Lox. It was released by Epic Records on September 26, 2002, as the lead single from her third studio album, This Is Me... Then (2002). The song, first leaked online, was written by Lopez, Troy Oliver, Mr. Deyo, Samuel Barnes, and Jean Claude Olivier. Cory Rooney, Olivier, Barnes, and Oliver produced the song. Another version of the track features solely Lopez, which was part of the Brazilian edition of the album.