Cool for the summer? More like HOT DAMN! Where has Demi Lovato been hiding these dangerous curves?!

The 23-year-old starlet performed at Jimmy Kimmel Live on Monday afternoon, and after performing her new single, she hung out with fans and signed autographs and snapped selfies.

On Sunday, Demi sang "Cool For The Summer" at the MTV VMAs, and she absolutely nailed it. The track is from her upcoming fifth studio album, Confident, which will drop on October 16. "I named the album Confident, because that's where I'm at in my life," she told E! News on the red carpet. She also touched on her sexy new Cosmopolitan cover. "It took so much for me to get to a place where I would feel comfortable enough to do that," she added.

Wilmer Valderrama sure is one lucky guy! Wonder when he's going to pop the question? After all, Demi basically already hinted that she's ready!

Watch Demi's performance of "Neon Lights" on Jimmy Kimmel last night!