Duets: The Final Chapter is the second posthumous album by American rapper The Notorious B.I.G., and is a collection of songs featuring appearances of other prominent rappers. The album was released by Bad Boy Records and Atlantic Records in the UK on December 19, 2005, and in the US on December 20 and charted at #3 selling 438,000 copies, beaten by the extremely high sales of Jamie Foxx's Unpredictable and Mary J. Blige's The Breakthrough. In the UK it climbed as high as #13 after the release of the album's first single "Nasty Girl". It is his second posthumous album that was certified platinum.

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.