Star Tracks: Thursday, May, 19, 2011

01 of 16

GARDEN PARTY

GARDEN PARTY
Ian Gavan/amfAR11/Gett

Gwen Stefani makes another trés chic arrival – this time in a custom L.A.M.B. gown – at Cannes's annual amfAR Cinema Against AIDS dinner at the Hotel du Cap-Eden Roc in the South of France on Thursday.

02 of 16

GREAT EX-PECTATIONS

GREAT EX-PECTATIONS
Xposure

After partying together in Spain, Pippa Middleton keeps the reunion going with ex George Percy during lunch at London restaurant Casa Brindisa on Thursday.

03 of 16

THREE MEN

THREE MEN
Richie Buxo/Splash News Online

Meet the new cast of Two and a Half Men! Ashton Kutcher makes his debut as the new star of the hit sitcom Wednesday, promoting the show alongside costars Jon Cryer and Angus T. Jones at the CBS upfront presentation in N.Y.C. "We are old friends from our male modeling days," Cryer said of his new costar.

04 of 16

POINT TAKEN

LEONARDO DICAPRIO
Brauer/Startraks

After relaxing on a yacht with Blake Lively, Leonardo DiCaprio gets back to work Wednesday by making an important point at the Cannes Film Festival's Cinema for Peace dinner.

05 of 16

COORDINATED COUPLE

COORDINATED COUPLE
Freddie Baez/Startraks

She looks ready to pop! Mom-to-be Natalie Portman bundles up in her favorite winter wear Wednesday while strolling with fiancé Benjamin Millepied in New York.

06 of 16

THE LIFE AQUATIC

THE LIFE AQUATIC
Optic Photos/Pacific Coast News

After hitting the Cannes red carpet with wife Gwen Stefani, Gavin Rossdale enjoys some chill time with sons, Kingston, 4, and Zuma, 2, on Wednesday in Atibes, France.

07 of 16

GONE COUNTRY

GONE COUNTRY
FlynetUK/Flynet

Cameron Diaz links up with Oscar-winning costar Colin Firth Thursday on the London set of their new movie, Gambit.

08 of 16

CHIC SEAT

CHIC SEAT
Clint Spaulding/PatrickMcMullan/Sipa

After stepping out at the Cannes Film Festival, Vanessa Hudgens keeps the glam turns coming stateside, attending the New York launch party for MyHabit.com on Wednesday.

09 of 16

THE WRITE STUFF

THE WRITE STUFF
PNP/WENN

Kelly Bensimon takes a break from writing her Wednesday to hang with Real Housewives of New York costars Jill Zarin and LuAnn de Lesseps at a party celebrating her new column in AM New York newspaper.

10 of 16

WET KNOWS

WET KNOWS
Freddie Baez/Startraks

Though the New York weather is frightful, Hugh Jackman, daughter Ava, 5, and pup Dali let the good times roll on Wednesday.

11 of 16

RUFFING IT

RUFFING IT
Fame

Steve Carell and a four-legged pal look for love Wednesday on the L.A. set of his apocalyptic romantic-comedy, Seeking a Friend for the End of the World.

12 of 16

TEXT BOOK

TEXT BOOK
Humberto Carreno/Startraks

Class may be out, but 90210 star AnnaLynne McCord can't get enough of set dressing, sporting another schoolboy-inspired look Wednesday while strolling (and scrolling!) in N.Y.C.

13 of 16

GOOD SPIRITS

GOOD SPIRITS
X17

Just a short time after her beloved dog Norman passed away, Jennifer Aniston keeps her chin up Monday, while running errands in Los Angeles.

14 of 16

BELLE NOIR

BELLE NOIR
Dominique Charriau/WireImage

All eyes are on Kirsten Dunst, who maintains a fashionable front before the Wednesday premiere of her sci-fi drama Melancholia at France's Cannes Film Festival.

15 of 16

HAND-Y MAN

HAND-Y MAN
Laurent Despois/Splash News Online

Also spotted in Cannes: Rob Lowe! The new author, who hit the festival as one of Miramax's investors, managed to make waves while leaving the Hotel Martinez on Wednesday.

16 of 16

LAUGH IN

LAUGH IN
Kevin Mazur/Wireimage

Smiles for miles! Stars Marc Anthony, Jada Pinkett Smith, and George Lopez share a joke at the TEN Upfront presentation on Wednesday at Manhattan's Hammerstein Ballroom.

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