The Grammy winner served as the singer's "Sally girl," making a surprise appearance while he performed his track "Sally, When ...

The “Party 4 U” singer shocked audiences when she stepped out for musical guest Role Model’s set during the Oct. 11 episode, hosted by Amy Poehler. As Role Model (real name Tucker Pillsbury) performed ...

Charli XCX added more speculation to a rumored feud with Taylor Swift this weekend by wearing a simple t-shirt that fans believe was directed at Swift. Here's what we know. On Saturday, October 11, ...