Demi Lovato & Tove Lo Are 'Cool For the Summer' at Tampa Jingle Ball 2015

Demi Lovato brings Tove Lo on stage during her set for an amazing performance at 93.3 FLZ’s Jingle Ball 2015 held at Amalie Arena on Saturday night (December 19) in Tampa Bay, Fla.

“There honestly isn’t anyone cooler than @tovelo. Thanks lady for coming on stage and performing #CoolForTheSummer with me.. I’m so glad we got to know each other this tour!!” Demi, 23, shared on Instagram.

Also performing at the closing Jingle Ball concert were 5 Seconds of Summer, Shawn Mendes, Camila Cabello, Conrad Sewell, Hailee Steinfeld, Alessia Cara, Zedd and Charlie Puth.

30+ pictures inside from the Tampa Jingle Ball 2015…