Star claims single Kate has been calling ex Owen Wilson again. Geez, lady...can't you take at least one month off from riding your merry-go-round of ex-loves?

"He felt betrayed when she dumped him for his friend Lance [Armstrong]," says a source. "But after a while, he caved in. It's not fair to Owen. He really cares for her and ends up getting hurt."

Owen, Owen, Owen. You keep making the same mistakes over and over again. If you let Kiss Me Kate back in, you might be taking on more than you can handle.