"Can't Believe" is a duet by American recording artists Faith Evans and Carl Thomas.

It was written and produced by Sean Combs and Mario Winans for Evans' third studio album Faithfully (2001) and is built around a sample of "Phone Tap" as performed by The Firm and penned by Nas, Anthony Cruz, Chris Taylor, Jermaine Baxter, and Dr. Dre.

The track appeared on Combs' Bad Boy compilation and third studio album The Saga Continues... (2001) and was later released as the first single from Evans' album.

An accompanying music video was filmed by director Chris Robinson in 2001.

Credits adapted from the liner notes of Keep the Faith.