It's a Star Tracks bonanza! Brad the Dad, Ashlee's prom night, Lindsay in a bikini (and an ankle bracelet) and more. (People.com) DOUBLE SCOOP Brad Pitt gives his children Pax and Zahara a boost during a family fun day Aug. 26 on New York's Upper East Side. DRY IDEA Bikini, check! Surfboard, check! Alcohol-monitoring bracelet, check! Lindsay Lohan is ready for a day at the shore July 21 at Malibu's Polaroid Beach House, where she attended a Boost Mobile barbecue. GET DOWN TONIGHT Tom Cruise and Katie Holmes have a "grind" old time on the dance floor July 24 while hosting a "welcome to America" party for pals Victoria and David Beckham at L.A.'s Museum of Contemporary Art. HALLOWEEN MASH-UP A showgirl? A paparazzo? Or, a fiesta queen? Only Britney Spears knows as she dons a variety of costumes including a pink zebra ensemble during Heidi Klum's annual Halloween bash at Hollywood hot spot the Green Door. JUST MARRIED! After tying the knot in Miami over the weekend, British singer Amy Winehouse and new husband Blake Fielder-Civil take their romance on set for the video shoot of her latest single, "Tears Dry on Their Own," in Miami on May 22.