The Girls Next Door star suits up in her two-piece to lead the world's largest bikini parade in Las Vegas. Plus: Gretchen & Slade, Ellen Pompeo, Pete & Ashlee and more

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STAYING CONNECTED

Fellow couple Ashlee Simpson-Wentz and husband Pete Wentz have a parents' night out at the T-Mobile Sidekick LX Launch party on Thursday. At the bash, the couple hung with Blink-182's Mark Hoppus in a VIP booth and rocked out when Travis Barker hit the stage to drum along with DJ AM.