Taylor Swift, Charli XCX, and Pharrell Ruled the Jingle Ball Roost Last Night

The joy of events like iHeart Radio's annual Jingle Ball extravaganza -- held last night at New York City's Madison Square Garden -- is twofold for pop fans. For one thing, a revolving stage and abbreviated set times meant a constant stream of hits by artists such as Charli XCX, Nick Jonas, Pharrell, and Iggy Azalea without unnecessary deep cuts...