"B Boy Baby" is a song written by British recording artist Mutya Buena with prominent background vocals by singer Amy Winehouse.

The song samples "Be My Baby" by the Ronettes, written by Phil Spector, Ellie Greenwich and Jeff Barry, with new lyrics by Angela Hunte.

"B Boy Baby" resulted from sessions with British producer Salaam Remi, famous for his work with Amy Winehouse, Nas, and Fugees.

Sharon Mawer of Allmusic wrote, "Buena raps the verses on "B Boy Baby" before launching into a chorus consisting of a slowed down version of the Ronettes/Phil Spector '60s masterpiece which even Amy Winehouse couldn't save from dreary boredom.

"[1] Popjustice's Peter Robinson hoped that Winehouse's appearance on the "almost universally disapproved-of" song could help Buena's fledgling solo career "turn around.