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Sightings: Lance, Lindsay and Sienna

Mon., May. 5, 2008 3:31 PM PDT by Marc Malkin

Seth Browarnik

MIAMI HEAT: Lance Bass, letting the sparks fly as he celebrated his birthday with friends, including CAA superagent Kevin Huvane, at Dek23 in South Beach with P.i.n.k. vodka VIP bottle service throughout the night.

GOOD SPORT: David Beckham, picking up gear at the Adidas store in Santa Monica.

LOST VEGAS: Michelle Rodriguez, partying at the Bank nightclub in the Bellagio in Las Vegas.

BAKER'S DOZEN: Lindsay Lohan, picking up a bag of bagels and a turkey sandwich with extra mayo at Noah’s Bagels in Larchmont Village in L.A.

MODEL BEHAVIOR: Izabel Goulart, hosting a day of shopping at the Armani Exchange store in New York’s Soho neighborhood, with partial sales benefiting the Diabetes Research Institution.

MORNING GLORY: Gretchen Mol and family, having breakfast at Cafe Cluny in New York City.

DRINK UP: Stephen Dorff, doing shots of Patrón at Chicago’s the Underground.

SEAL OF APPROVAL: Heidi Klum, showing up for the end of hubby Seal's performance at the 50th Grammy Celebration Tour presented by T-Mobile Sidekick at Avalon in L.A.

MILLER TIME: Sienna Miller, celebrating the end of filming of G.I. Joe and her return to London with Martini & Rossi Prosecco drinks at a private house party in L.A. with friends Tara Summers, Matthew Rhys, Balthazar Getty, Jack McBrayer, Emmanuelle Chriqui, Ioan Gruffudd, industry honchos Holly Wiersma and Cassian Elwes and her G.I. Joe costar Channing Tatum.