The DWTS pros celebrate their spread in S.I.'s Swimsuit issue in Sin City. Plus: Zac Efron, Kim Kardashian, Gerard Butler and more

PUCKER UP

Kim Kardashian blows a kiss to boyfriend Reggie Bush from the runway at The Heart Truth Red Dress Collection Show Thursday. The charity event, part of New York Fashion Week, also drew out stars like Heidi Klum and Elisabeth Hasselbeck.