"All Night Long" is a song by American R&B singer Faith Evans featuring guest vocals by Puff Daddy.

It was written by Evans, Sean "Puff Daddy" Combs, Ron "Amen-Ra" Lawrence, Schon Crawford, Clarence Emery, Todd Russaw, and Todd Gaither for her second album Keep the Faith (1998), while production was helmed by Lawrence, Combs, and Evans.

The song contains a sample from "I Hear Music in the Streets" (1980) by American post-disco group Unlimited Touch.

Chuck Taylor from Billboard found that the "trips along with beautifully layered harmonies and a sensual, commanding vocal, all about finding the vibe and taking time to make it all feel right.

"[1] Allmusic editor Jose F. Promis felt that "All Night Long" was as "equally intoxicating" as previous single "Love Like This.