Star Tracks: Wednesday, August 17, 2011

01 of 15

MAKING A SCENE

After arriving in Glasgow, Scotland on a private train, PEOPLE cover star Brad Pitt returns to work Wednesday, shooting scenes for new movie World War Z.

02 of 15

BEACH BABE

A beaming Julia Roberts emerges from the water in Kauai, Hawaii, Tuesday, where the actress is vacationing with husband Danny Moder and their kids (not pictured).

03 of 15

SURPRISE!

What's she up to? A cheeky – and oh-so-stylish – Pippa Middleton gives a smile in central London on Tuesday.

04 of 15

EASY RIDER

And he's off! The Amazing Spider-Man star Andrew Garfield makes his way around West Hollywood Tuesday on his trusty Vespa.

05 of 15

CARRY ON

What a cute pick-me-up! How I Met Your Mother star Alyson Hannigan gives her 2-year-old daughter Satyana a lift in Santa Monica, Calif., on Tuesday.

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BUMP WATCH

Can you spot the baby bump? All eyes are on mom-to-be Hilary Duff's burgeoning belly as she does a little shopping in Beverly Hills on Tuesday.

07 of 15

BOWLED OVER

She's getting a kiss from The Dude! Jeff Bridges puckers up to The Big Lebowski costar Julianne Moore Tuesday night at the release of the Blu-Ray edition of the cult film in New York.

08 of 15

ALL IN THE FAMILY

Alanis Morissette and husband Mario "Souleye" Treadway only have eyes for their precious cargo – son Ever, nearly 8 months – in Venice, Calif., on Tuesday.

09 of 15

DEPARTURE DATE

Christina, is that you? Sporting oversized shades and a hat, Aguilera tries to keep a low-profile Tuesday while flying out of LAX with boyfriend Matthew Rutler.

10 of 15

FRINGE BENEFIT

Cowboys & Aliens star Olivia Wilde stays hippie chic while out and about in Santa Monica, Calif., on Tuesday.

11 of 15

HEROIC MEASURES

Someone call for a superhero? Action star Chris Evans suits up to save the world Tuesday, reporting to the Cleveland set of The Avengers as alter ego Captain America.

12 of 15

BUMP IT UP

Mom-to-be Rebecca Gayheart shows off her baby bump in blue while running Tuesday-afternoon errands in Los Angeles.

13 of 15

BLUE CRUSH

Good luck, Chuck! Ed Westwick works his smoldering good looks while sharing the spotlight with a four-legged friend on the N.Y.C. set of Gossip Girl Tuesday.

14 of 15

IN GEAR

Ashley Tisdale sticks to her workout regimen, topping off her sporty look with a colorful cap and shades while heading to a West Hollywood gym on Tuesday.

15 of 15

MONEY MAN

Melissa & Joey star Joey Lawrence brings out the big guns – and his wallet! – to feed the parking meter in L.A. on Tuesday.