Rihanna and Ryan Phillippe “totally had sex.”

Last week there was a rumor that Ryan Philippe, who is supposed to be dating Amanda Seyfried, was hitting on Rihanna, but then people were saying Ryan was really still with Amanda and Rihanna was sexting Colin Farrell. Now Us says that Rihanna and Ryan have been hooking up for months. Who says Hollywood is like high school?

Though Rihanna, 23, appeared to blow off Phillippe, 36, at a brunch in L.A. on Feb. 12, a second insider says it was actually just the opposite -- and that the two had a sleepover that very night!
"She thinks he's hot. They totally had sex. And it wasn't even the first time!"
"They initially hooked up back in early December," says a Rihanna source ... then reconnected at a charity event Feb. 19.
The next day, he went to her 23rd birthday party at a Beverly Hills home.
"They hung out a bit, but were discreet. It is still very casual."
Sums up another source, "Clearly they're keeping it on the downlow.

Next week, Us will be reporting that Erin is a total bitch, did you see the way she was looking at Brad, Kelly is not going anywhere with her. In my yearbook, she was all, "Have a Gr8 summer!!" but that fake bitch didn't mean it.