Stars' Bikini Styles

See how Jessica Alba, Tara Reid, Cameron Diaz and others work their two-piece magic – then tell us what you think. By Emily Fromm

01 of 11

TARA REID

TARA REID
Fame

The Wild On Tara host can barely contain her enthusiasm while partying in Saint-Tropez in July. Luckily, the center tie on her floral string bikini is strong enough to contain the wardrobe-malfunction-prone star.

02 of 11

JESSICA ALBA

JESSICA ALBA
Flynet

"I work out more when I'm going to be photographed in a bathing suit," the star (vacationing in Mexico with boyfriend Cash Warren on Aug. 1) admits. Alba, who favors Tae Bo and elliptical machines, will soon trade her teeny-weeny yellow bikini for a wetsuit: She plays a diver in next month's adventure movie Into the Blue.

03 of 11

CAMERON DIAZ

CAMERON DIAZ
Flynet

"I didn't work out until I started Charlie's Angels," the actress (in Oahu in June) has said. Now she stays in shape by surfing, snowboarding and even golfing with beau Justin Timberlake. Her brown string bikini can obviously keep up: She's worn it while catching waves in Hawaii with Timberlake for the past three summers.

04 of 11

PARIS HILTON

PARIS HILTON
L Boutria/P Bar/Maxppp /Landov

If the heiress (on holiday with sister Nicky in Saint-Tropez in July) seems to be standing a little taller lately, credit her new routine of thrice-weekly Pilates workouts with her athletic fiancé, accomplished skier and tennis player Paris Latsis. Here, she gets catty in a leopard-print triangle-top bikini and matching sarong.

05 of 11

MISCHA BARTON

MISCHA BARTON
Andre Shawaf/ Pacific Coast News

The naturally slender star, who says, "I don't not eat anything," admits there's one physical attribute she wouldn't mind changing: "My butt," she says. "It's just not toned at all." Still, the O.C. star (lounging at a Santa Barbara resort recently) is fit enough to pull off this skimpy, multicolored two-piece.

06 of 11

LINDSAY LOHAN

LINDSAY LOHAN
GSV/X17

After raising eyebrows recently with her dramatically thinner form, the actress (in a retro-print swimsuit in Hollywood in June) is now working to bulk up. "I've been lifting," she says. "I do crunches a lot. It's mostly legs and stomach and arms. Everyone was saying that I was losing too much weight, so I want to put some muscle on my arms."

07 of 11

NICOLE RICHIE

NICOLE RICHIE
Flynet

The Simple Life star's increasingly slim physique has had some critics calling her and pal Lindsay Lohan the "Skeleton Crew." But Richie (in a multicolored bikini in Malibu last month) swears her weight loss is healthy. Thanks to working out and eating right, she says, "I have more energy and I'm more confident."

08 of 11

MARIAH CAREY

MARIAH CAREY
Fraser/LDP images

In July, she showed off a six-pack that was rumored to be airbrushed on (her rep said the singer has just been "eating right and working out three hours a day with her personal trainer"). Spray-on tan or not, Carey looks fit in a dainty lilac two-piece aboard a yacht on the Mediterranean recently.

09 of 11

UMA THURMAN

UMA THURMAN
Splash

She learned sword fighting and kung fu for her Kill Bill movies, but the mom of two credits her figure to yoga – and good genes. "I'm lucky that I'm very tall and have a high metabolism," the 6-ft. actress has said. In Capri, Italy, in June (with 3-year-old son Levon), she shows off her genetic gifts in an orange swimsuit.

10 of 11

ELIZABETH HURLEY

ELIZABETH HURLEY
Bauer-Griffin

The actress turned swimwear designer (in Capri in July) knows how to look good in a bikini – like this lime-green number. But she says her real secret is her son, Damien, 3: "We're constantly jumping up and leaping over gates. Heaving the baby around – that helps, too."

11 of 11

KIRSTEN DUNST

KIRSTEN DUNST
Ginsburg-Spaly/X17

For the Elizabethtown star, working out is more fun with a friend. She and beau Jake Gyllenhaal have been spotted hitting the gym together, lifting weights and walking the treadmill side-by-side. The buddy system must work: The actress (in L.A. in June) can get away with this tiny bandeau-top bikini.

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