The exes reunite to spend time with son Ryder in N.Y.C. Plus: Paris, Reese & Vince, Posh & Becks and more

2 of 15

VIEW FROM THE TOP

After hosting a private event at Mansion, Paris Hilton stays on top of the Miami party scene on Thursday, hitting Mokai nightclub, where she got close to ex-boyfriend Stavros Niarchos.