With the Femme Fatale tour underway, NYC saw Kanye West as a surprise guest during Nicki Minaj's opening set. The two performed their smash hit "Monster." The Britney Spears tour continues into New Jersey tonight, and will hit Europe by the third week of September.
Video: Nicki Minaj Brings Kanye West Out for "Monster" on The Femme Fatale Tour
Aug 3, 2011