"Mo Money Mo Problems" is a song by American rapper The Notorious B.I.G., released as the second single from his second and final studio album, Life After Death (1997) on July 15, 1997 by Bad Boy Records and Arista Records. It features guest performances from labelmate Mase and label boss Sean "Puff Daddy" Combs; all three performers co-wrote the song with Stevie J, who also co-produced it with Combs. "Mo Money Mo Problems" contains a sample and an interpolation of "I'm Coming Out" by Diana Ross, for which Bernard Edwards and Nile Rodgers are also credited as songwriters; the sampled portions are heard in the production, while the hook is interpolative and performed by Kelly Price in an uncredited appearance.

Christopher George Latore Wallace, better known by his stage names The Notorious B.I.G., Biggie Smalls, or simply Biggie, was an American rapper. Rooted in East Coast hip hop and particularly gangsta rap, he is widely considered one of the greatest rappers of all time. Wallace became known for his distinctive laid-back lyrical delivery, offsetting the lyrics' often grim content.