Poker Face

Released her debut album The Fame in 2008, Stefani Joanne Angelina Germanotta (born March 28, 1986), better known by her stage name Lady Gaga, is an American theatrical musician, performance artist and dancer. She began her career as a songwriter for established artists, including Fergie, Pussycat Dolls, Britney Spears and New Kids on the Block, as well as American singer and producer Akon.

source: wikipedia