Demi Lovato & Ryan Phillippe: New Couple Alert?

He might be twice her age, but that isn't stopping the reported new romance between Demi Lovato and Ryan Phillippe.

According to E! Online, the 18-year-old singer and the 36-year-old actor - a seemingly unlikely duo - have been dating on the D-L for the last few months.

While the relationship had been moving rather quickly, a source told the site that things have since quieted down following the recent birth of Ryan's daughter, "It was really hot and heavy for a while," adding that the welcoming of 2-week-old Kai "kind of threw her for a loop."

Adding to the relationship slow-down, is Demi's promotional tour for her just-released single "Skyscraper" - the first musical offering from Lovato since leaving a treatment center earlier this year.