Star Tracks: Thursday, December 15, 2011

Kardashian steps out for son Mason's second birthday in L.A. Plus: Sofia Vergara, Katy Perry, Justin Beiber and more

01 of 15

B-DAY OUTING

B-DAY OUTING
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Mom-to-be Kourtney Kardashian stays in step with boyfriend Scott Disick and birthday boy Mason, who celebrated his second birthday on Wednesday with a viewing of Disney on Ice at L.A.'s Staples Center.

02 of 15

GIGGLE FIT

GIGGLE FIT
Jen Lowery/Splash News Online

What's so funny? Sofia Vergara and Gerard Butler keep each other in stitches while taking a break from announcing the 2012 Golden Globe nominations Thursday at the Beverly Hilton Hotel.

03 of 15

THE CAT'S 'MEOW'

THE CAT'S 'MEOW'
David Wright/Startraks

After being named one of 2011's Most Fascinating People, Katy Perry beams while aboard a trolley Wednesday during the unveiling of her new perfume, Meow!, at The Grove shopping center in L.A.

04 of 15

HOT WHEELS

HOT WHEELS
Splash News Online

Justin Bieber gets behind the wheel Wednesday, heading out for a night of bowling at Lucky Strike in downtown L.A.

05 of 15

MOTHER LOVE

MOTHER LOVE
Splash News Online

Jessica Alba can't contain her joy during a holiday shopping trip with four-month-old daughter Haven in Santa Monica, Calif., on Wednesday.

06 of 15

EXTREME CLOSE UP!

EXTREME CLOSE UP!
Landov

Jude Law gets up close – and personal! – with Sherlock Holmes: A Game of Shadows costar Robert Downey Jr. Thursday during an appearance on The Graham Norton Show in London.

07 of 15

MAN ABOUT TOWN

MAN ABOUT TOWN
Pacific Coast News

Back in London after his U.S. jaunt, Prince Harry leaves Jak's restaurant, his first stop during a fun Wednesday night out.

08 of 15

THE BELLY CURVE

THE BELLY CURVE
Jenny White/Broadimage

Mom-to-be Hilary Duff shows off her growing baby bump in West Hollywood on Wednesday.

09 of 15

TO THE POINT

TO THE POINT
Lluis Gene/Getty

Sporting one of her favorite stage ensembles, Rihanna gives fans what they want at a concert in Barcelona, Spain, on Wednesday.

10 of 15

HOLLER IF YOU HEAR ME

HOLLER IF YOU HEAR ME
Splash News Online

InStyle cover girl Jennifer Garner enjoys a day out with her bundle of joy, 2½-year-old Seraphina, in Santa Monica, Calif., on Wednesday.

11 of 15

SHOP TO IT

SHOP TO IT
Marcus/Splash News Online

He won't be solo for long! The Bachelor's Ben Flajnik heads out on his own Wednesday while hitting up The Grove in L.A.

12 of 15

LEASH ON LIFE

BLAKE LIVELY
Allan Bregg/Splash News Online

Blake Lively plays dog-sitter to beau Ryan Reynolds's mutt Baxter for the second day in a row Wednesday, taking the pooch for a walk during a break in filming Gossip Girl in New York.

13 of 15

STRIDE RIGHT

STRIDE RIGHT
INF

Leaving main man Louis at home, a bundled-up Sandra Bullock exits her New York City hotel en route to a workout Wednesday.

14 of 15

MUSIC MATES

MUSIC MATES
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Lady Antebellum's Charles Kelley and Hillary Scott have each other's backs while stopping by the New York City studios of Good Morning America Wednesday, where the country group – including Dave Haywood – performed.

15 of 15

ROLE CALL

ROLE CALL
Kevork Djansezian/Getty

Actresses Regina King and Judy Greer team up Wednesday to announce the Screen Actors Guild Award nominations in Los Angeles, where Greer earned a best cast ensemble nod for The Descendants.

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