We can't believe how many cool costumes our fave celebs wore onstage during Y100's Jingle Ball 2014 celebration in Miami, Florida last night! Stars like Ariana Grande, Meghan Trainor, Becky G., Camila Cabello and Iggy Azalea all donned festive winter-perfect styles for the big event, while guys like Nick Jonas and Jake Miller kept their signature looks cool and casual.
Click through the gallery to see pics from the latest Jingle Ball event. Which star's style is your fave? Tell us what you think below!