No Boys Allowed is the second studio album by American recording artist Keri Hilson, released on December 17, 2010 through Mosley Music and Zone 4 Records. On the album, Hilson is reunited with Timbaland and Polow da Don, who executively produced the album, as they did with her debut release. She also worked with several other producers and songwriters, including Ne-Yo, John Legend, StarGate, Bei Maejor and Boi-1da, among others. Meanwhile, Chris Brown, Rick Ross, J. Cole, Nelly, Kanye West and Timbaland all have featured guest vocals. Musically, No Boys Allowed is an R&B album, which incorporates pop, soul, electro and dancehall into the songs.