Star Tracks - Monday, March 5, 2007

Back on her high heels the day after a brief hospital visit for dehydration, Nicole Richie heads to Beverly Hills eatery Mr. Chow on Saturday with boyfriend Joel Madden (in the driver's seat).

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What an arresting development! Dressed as a 1920s flapper, Madonna is led away by an undercover officer – that would be husband Guy Ritchie – at the Los Angeles Kabbalah Centre's annual Purim festival on Saturday. Two years ago, the couple caused a stir when they attended a Purim party in London dressed as the Pope and a nun.

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With a bottle and toys in hand, Tom Cruise and Katie Holmes are prepared to take 10-month-old daughter Suri to big brother Connor's basketball game in Beverly Hills on Sunday.

Before kicking off his Love, Pain and the whole crazy World tour next month, Keith Urban chills out with wife Nicole Kidman on a St. Bart's beach on Monday.

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In case there is any doubt who's headlining this party, Kevin Federline shows off his top billing at The Beatles Revolution Lounge in the Mirage Hotel amp Casino in Las Vegas on Sunday. It's a rare appearance for the aspiring rapper, who has been in daddy mode with sons Sean Preston, 18 months, and Jayden James, 6 months, since estranged wife Britney Spears checked into rehab.

Back from her tour of India, Scarlett Johansson makes a ladylike appearance at the Louis Vuitton show at Paris Fashion Week on Sunday. Designer Marc Jacobs told reporters the collection was an homage to Dutch painter Johannes Vermeer's "Girl with a Pearl Earring" – a painting that inspired the 2003 film that starred Johansson.

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Beginner's luck or card shark? Paris Hilton wins big at the World Poker Tour Celebrity Invitational charity event in Commerce, Calif., on Saturday. When the dealer pushed the winnings in her direction, the heiress responded, "I won?" The event also brought out Vince Vaughn, Jon Favreau, Don Cheadle and Hilton's little sister, Nicky.

Former rival catwalkers Tyra Banks and Naomi Campbell strike a classic Olsen twins pose at the 38th annual NAACP Image Awards in Los Angeles on Friday.

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Jennifer Lopez hits the stage at Miami's American Airlines Arena to perform at the Viva Romance concert on Saturday. Following Lopez's performance, two announcers from Romance 106.7 radio station (the concert sponsor) presented the surprised pop star with a key to Miami. "I love you! Gracias, Miami!" Lopez yelled to fans as she left the stage.

Penélope Cruz may not have taken home Oscar gold, but she earns a special – and edible – prize during an appearance at the five-day Sanremo Festival of Italian Song in Sanremo, Italy, on Friday.

What skinny jean trend? Following her elegant appearance at the Oscars, Liv Tyler gets back into casual mode (which means a roomy pair of denims!) after taking a meeting in Beverly Hills on Thursday.

New couple alert? Oscar nominee Djimon Hounsou steps out with Kimora Lee Simmons Thursday for a late dinner at Matsuhisa restaurant in Beverly Hills. Later, the pair headed over to West Hollywood hot spot Winston's.

With her juice holster, iPod armband and mega-headphones, Fergie is all set to take her daily workout to a whole other level in West Hollywood on Thursday.

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Foxy Brown gives the thumbs up after leaving a Manhattan courthouse on Friday after pleading guilty to violating her probation. Two weeks earlier, Brown spent the night in jail after an incident at a beauty supply store in Pembroke Pines, Fla., where she reportedly squirted hair glue at the store owner. The rapper was charged with battery and resisting arrest.

Leave it to Jennifer Love Hewitt to give her classic little black dress a sporty update! The actress goes for comfort as she gets ready to commune with the dead on the Los Angeles set of the Ghost Whisperer on Thursday.

Somehow we thought he'd be...less friendly. Whether she likes it or not, tennis champ Serena Williams has a new pal in the Grinch at the National Education Association's Read Across America party at the New York Public Library on Friday. The organization celebrated the 50th anniversary of Dr. Seuss's The Cat in the Hat.