Jingle Ball concerts just keep spreading the holiday cheer and the stars performing at each event keep wowing us with their red carpet styles at each event! Last night, stars like Ariana Grande, Demi Lovato, Iggy Azalea, Charli XCX and more dazzled at Hot 99.5's Jingle Ball 2014 in Washington, D.C.
Click through the gallery above to see the coolest costumes and red carpet looks from the latest Jingle Ball. Which star's look is your fave? Tell us what you think in the comments!