Sightings: Watts, Meester and Common

Naomi Watts lunches with son Alexander, Leighton Meester plays with a toy, Common checks into Chicago

BAG LUNCH: Naomi Watts, taking home some leftovers after having lunch with son Alexander in Santa Monica, Calif.

SAX APPEAL: Common, checking into the Hotel Sax in Chicago while in town for a benefit for his Common Ground Foundation.

MEATHEADS: Amy Adams and Sarah Lancaster, enjoying petit filet entrees at BOA Steakhouse in Las Vegas' Forum Shops.

EASY RIDER: Tim Allen, dressed in motorcycle gear and carrying a helmet while picking up a coffee at Starbucks in L.A.'s Grove mall.

GIRL POWER: Vanessa Williams, Judith Light and Tony Plana, hitting the p.i.n.k. vodka-sponsored VIP room at the Second Annual Women Empowering Women Gala in NYC, where their Ugly Betty costar Ana Ortiz was honored with a Lifetime Achievement Award.

DINO MIGHTY: Leighton Meester, Mark Indelicato and Tyson Beckford, checking out the Pleo Dinosaurs at the Elisabeth Glaser Kids for Kids Carnival in NYC.

SHAQ SNACK: Shaquille O'Neal, taking his daughters to Dylan’s Candy Bar store in Houston for some milkshakes.

PROJECT RUNWAY: Julia Louis-Dreyfus, playfully mimicking the models at the Louis Vuitton fashion show at the Coral Casino Beach reopening in Santa Barbara, Calif.

SOUND OF MUSIC: Taryn Manning, explaining her debut solo album will be a "fusion of pop, rock and hip-hop" at Christina Aguilera's Rock the Vote event at the Esquire House in the Hollywood Hills.

HUNGRY MAN: LL Cool J, enjoying dishes prepared by chef Nick Lacasse of the Drawing Room at Chicago's Le Passage after opening that night for Janet Jackson.

SWEET CAKES: Chuck star Zac Levi, celebrating his birthday with friends and family at his L.A.-area home with two Cold Stone Creamery ice cream cakes, Cookie Dough Delirium and Midnight Delight.

CASUAL CUTE: A dressed-down Christina Milian, dining with her bodyguard at Mexicali in Studio City.

DADDY'S GIRL: Julia Stiles, picking up a birthday gift for her father at the Kenneth Cole store on New York's Fifth Avenue.

FRIENDS FOREVER: Selena Gomez, picking up a Miguel Torres belt for best friend Demi Lovato at the Backstage Creations-produced AmberWatch Foundation Fun Fair in L.A.

COMING UP

NUMBER ONE: Kevin Costner, Lance Bass, Justin Long and Lauren Conrad are among the guests expected Thursday at the Stoli Elit-hosted one-year anniversary party for One Sunset restaurant in L.A.

—Additional reporting by Dahvi Shira and Whitney English