George Clooney Hooking Up With "Croatian Sensation" Ex Monika Jakisic After Stacy Keibler Split!

How do you like your eggs, George? A source reveals in the new issue of Us Weekly that George Clooney, 52, had a sleepover with Croatian model Monika Jakisic, an on-and-off fling since 2004, at his L.A. mansion on Sept. 25.