The singer-actress and husband Marc Anthony show their allegiance to the Dolphins. Plus: The Jonas Brothers, Christina Milian, Ashlee Simpson-Wentz and more

FAMILY MATTERS

Flanked by husband Pete, sister Jessica – and hundreds of star-struck onlookers – Melrose Place star Ashlee Simpson-Wentz gets ready to dig in to a super-sweet cake during her 25th birthday party at the Wet Republic pool at the MGM Grand Hotel in Las Vegas on Saturday.