Nick Jonas & Demi Lovato Get All Dressed Up for Chicago's Jingle Ball!

Nick Jonas makes his arrival at the 2014 KISS FM Jingle Ball at Allstate Arena on Thursday evening (December 18) in Chicago, Ill.

The 22-year-old “Jealous” singer was joined at the big bash by Demi Lovato, Kiesza, Magic, Becky G, Fall Out Boy, and Shawn Mendes.

PHOTOS: Check out the latest pics of Nick Jonas

“I’m having fun on the @iHeartRadio #iHeartJingleBall Tour. Watch me at the NYC show on TV on @CW_Network tonight at 8p ET,” Nick tweeted that same night.

15+ pictures inside of Nick Jonas, Demi Lovato, and more at the event…