Over the last couple of months, Lovato, who turns 19 next month, and Phillippe, 36, are rumored to have been quietly dating, according to E! Online.
Lately, Demi has been busy working on her latest single Skyscraper, while Ryan has been taking care of his new-born daughter Kai that he has from his relationship with ex-girlfriend Alexis Knapp.
“It was really hot and heavy for a while,” an insider reveals, adding that Demi didn’t know for sure that he was going to be a father again “until it basically happened. It kind of threw her for a loop.”