U.N. is a Harlem, New York City-based hip hop duo formed by Cam'ron and Vado in 2009.
The group came to formation after Cam'ron had a falling-out with fellow Harlem rapper and co-founder of the Diplomats, Jim Jones in 2007.
It reached number 133 on the Billboard 200, and contained guest appearances from rappers Young Chris, Gucci Mane and Felony Fame.
A sequel, Gunz n' Butta was released in April 2011 independently through Diplomatic Man and Entertainment One; it performed slightly better commercially at number 77 on the Billboard 200.
It spawned the singles "Speakin' in Tungs", which peaked at number 82 on Billboard's Hip-Hop/R&B Songs chart, as well as the similarly received "Hey Muma".