Ariana Grande & Jonas Brothers: B96 Pepsi Jingle Bash!

Ariana Grande is red hot while hitting the stage at B96 Pepsi Jingle Bash held at Allstate Arena on Saturday (December 14) in Chicago, Ill.

The 20-year-old entertainer was joined at the concert by her boyfriend Nathan Sykes and his The Wanted bandmates, as well as Jason Derulo.

Nick and Joe Jonas held a semi-Jonas Brothers reunion minus their older brother Kevin, who is awaiting the arrival of his first child.

“Thank you B96 for having me at Jingle Bash! had a blast. lots of love Chicago :)” Ariana tweeted after the show.

30+ pictures inside of Ariana Grande and the Jonas Brothers at the concert…