Keri Lynn Hilson (born December 5, 1982 in Decatur, Georgia, USA) is a Grammy nominated American R&B singer-songwriter signed to Timbaland's Mosley Music Group. She is also a part of a collective of writers and producers known as The Clutch, and has written hits for many artists including Britney Spears, Usher, Ciara, Ludacris and Omarion, After performing on Xzibit's hit song Hey Now (Mean Muggin') and Timbaland's album Shock Value she released her debut album, In A Perfect World…, in 2009. It spawned the hit singles Energy, Turnin' Me On and Knock You Down which reached #3 on the Billboard Hot 100.