We had no idea that these two were dating, but apparently Jesse McCartney has broken up with Hayden Panettiere – who he was dating for less than a month. Above is a super old picture of the two, as they dated for such a short time no one was able to snap any recent pictures of them!

Rumor has it that Jesse has gone back to his ex-girlfriend Katie Cassidy, who he dated from 2005-2007, but her reps are denying it, saying: “Katie and Jesse are the greatest of friends, but there is no truth to them being back together romantically.”