June 11, 2012 12:00 PM

Beyoncé Knowles IS BACK!

HER WORLD’S A STAGE

Atlantic City, N.J., May 26

Beyoncé, performing for the first time since giving birth to her and Jay-Z’s daughter Blue Ivy Carter on Jan. 7, stuns during her four-show run at the new Revel resort. The fit mom showed off her post-baby body in several costumes, including a belly-baring fringed two-piece (inset, May 25).

J. LO’S SILVER STREAK

Las Vegas, May 26

Jennifer Lopez sings during a live show featuring artists she and her ex Marc Anthony (inset, who also performed) discovered while filming ¡Q’Viva! The Chosen.

RIHANNA ROCKS IDOL

Hollywood, May 23

Rihanna belts her single “Where Have You Been” during American Idol’s season finale. The songstress also debuted dreadlocks, which she tweeted she’s wanted “since I was 14.”

HANGING WITH MOM!

DOWN AT THE FARM

Moorpark, Calif., May 26

Gwen Stefani gives her boys a taste of the country at Underwood Family Farms, where she brought birthday boy Kingston (above), who turned 6 that day, and 3-year-old son Zuma (far right).

TIGHT BOND

New York City, May 23

Mariska Hargitay totes daughter Amaya, 1, at a Central Park Conservancy party.

LEADING LADIES

Kent, Conn., May 22

Katie Holmes lends 6-year-old daughter Suri a hand while out shopping.

FUN & THE SON

Los Angeles, May 23

Natalie Portman shows 11-month-old son Aleph a good time at a local park.

BABY CHIC

Cannes, May 26

Reese Witherspoon, who’s due this fall, shows off her baby bump in a Swarovski crystal-covered Atelier Versace gown at a screening for her film Mud, a drama costarring Matthew McConaughey.

READY, SET, DIP!

Hawaii, May 21

The Big Bang Theory’s Kaley Cuoco and boyfriend Bret Bollinger, a bassist and vocalist for the band Pepper, hang poolside in Hawaii.

POLITICAL PALS

London, May 22

Princess Beatrice poses with Chelsea Clinton at A Night Out with the Millennium Network, for which Clinton was honorary chair.

CALLING ALL STARS!

LOOK WHO’S IN UNIFORM!

New York City, May 26

Kristen Wiig, who signed off from Saturday Night Live May 19, suits up NYPD style while filming The Secret Life of Walter Mitty.

’60s DOUBLE TAKE!

Dublin, May 28

André Benjamin, aka André 3000, goes rock star for his role as Jimi Hendrix (inset) in the biopic All Is by My Side.

BEVERAGE BREAK

New York City, May 23

Channing Tatum and a longer- and-lighter-haired Rooney Mara on the set of The Bitter Pill.

CAM’S WHITE NIGHT

London, May 22

Cameron Diaz shines in a pantsuit and clutch—designed by pal Stella McCartney—at the premiere of What to Expect When You’re Expecting.

BRADLEY ON THE BALCONY!

Paris, May 28

Proving why he’s the Sexiest Man Alive, Bradley Cooper casually bares his bod in France.

FASHION LOVERS

Monaco, May 25

Jennifer Lawrence holds hands with her British boyfriend and X-Men: First Class costar Nicholas Hoult at the Amber Lounge fashion show.

WILL’S HOME TEAM

New York City, May 23

Will Smith brings wife Jada Pinkett Smith and kids Jaden, 13, and Willow, 11, to his Men in Black 3 premiere. “We make the effort to always put the family first,” the actor tells PEOPLE.

ALL-STAR LINEUP

Manchester, England, May 27

Celebs, including (clockwise from left) Will Ferrell, Michael Sheen, Gordon Ramsay, Gerard Butler and Woody Harrelson, test their skills on the field at Soccer Aid to raise money for UNICEF. Ramsay was carried away on a stretcher after reportedly injuring his back. “Thx 4 all the messages. Out of hospital after receiving amazing care from medics,” he later tweeted. “Bit sore but fine.”

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