Star Tracks: Wednesday, January 12, 2010

01 of 15

DISNEY DAY

Christina Aguilera gets an early start celebrating son Max's birthday – he turns 3 today – with a visit to Disneyland in Anaheim, Calif., Tuesday, where the b-day boy laughed it up with Mickey, Minnie and Donald Duck.

02 of 15

CUDDLE TIME

Katie Holmes takes time out from filming Jack and Jill Tuesday for a cuddle with daughter Suri, 4, at

L.A.'s Plummer Park.

03 of 15

BUMP WATCH

Can you spot the bump? All eyes are on mom-to-be Natalie Portman's burgeoning belly as she attends the premiere of her new romantic comedy, No Strings Attached (costarring Ashton Kutcher), Tuesday in Westwood, Calif.

04 of 15

HOLDING PATTERN

Jon Hamm, Ben Affleck and Blake Lively are the toast of The Town Tuesday at the National Board of Review of Motion Pictures Awards Gala in New York, where the film's stars were named best ensemble cast.

05 of 15

FACE TIME

After premiering Green Hornet, Cameron Diaz kicks back at the L.A. Lakers game Tuesday, where she cheered on the hometown team to a 112-57 victory over the Cleveland Cavaliers.

06 of 15

A SERIOUS MAN

Zac Efron steps out for a cause Tuesday, attending the H.O.M.E. Foundation's STIKS Celebrity Video Game Challenge in Hollywood.

07 of 15

BUILDING BLOCKS

He's a climber! Kendra Wilkinson and hubby Hank Baskett take their adorable 13-month-old son, Hank Baskett IV, out for some playground action Tuesday at a Los Angeles park.

08 of 15

UNBE-WEAVE-ABLE

Britney Spears covers up after fitting in a dance session in Hollywood Tuesday, the same day her new single Hold It Against Me was released.

09 of 15

ON POINT

Mommy, look over there! Sarah Jessica Parker and her excited 19-month-old twin tot, Tabitha, stay bundled up on a chilly Tuesday while out and about in New York.

10 of 15

FANTASTIC FOUR

Nicole Richie and Joel Madden take their 3-year-old daughter Harlow out in Hollywood with little brother Sparrow Tuesday. "Happy Birthday to my little princess," Madden Tweeted. "You make mommy and daddy so proud."

11 of 15

SIDEWAYS GLANCES

Rachel McAdams shows off her svelte figure – plus a little more! – at the London premiere of Morning Glory Tuesday.

12 of 15

SUIT HIM UP

The cold's got nothing on Chuck Bass! Ed Westwick looks extra dapper in a three-piece suit while filming Gossip Girl Tuesday in New York.

13 of 15

DINE & DASH

Is she stocking up on bridal magazines? Newly engaged Reese Witherspoon takes a break from her jog to grab some reading material (and a healthy bite!) in Brentwood, Calif., on Tuesday.

14 of 15

SITTING 'IDOL'

American Idol judges Steven Tyler, Jennifer Lopez and Randy Jackson joke around during their press tour panel discussion Tuesday in Pasadena, Calif., before season 10 premieres on Jan. 19.

15 of 15

TREADING WATER

Halle Berry sports an all-black ensemble – and makes sure to stay well-hydrated! – while running errands in Los Angeles Tuesday.