updated 02/14/2005 AT 01:00 AM EST

originally published 02/14/2005 AT 01:00 AM EST

Jim Carrey sure knows how to throw a party. On Jan. 29 the actor rented the Six Flags Magic Mountain theme park in Valencia, Calif., for a private bash just to celebrate making his upcoming comedy Fun with Dick and Jane. The star invited more than 500 guests, including the cast and crew and their families, to ride roller coasters, play arcade games and scarf down funnel cakes and burgers. Among those spotted at the park with their kids: producer Brian Grazer and the Wayans brothers—Keenen Ivory, Marlon, Shawn and Damon—who aren't in the film but who have been friends of Carrey's ever since their In Living Color days. The host himself particularly enjoyed one of the park's extreme roller coasters, "X," which includes a 200-ft. vertical drop that he braved with his 17-year-old daughter Jane. The cost for the six-hour shindig: well over $100,000.

Retired rapper Jay-Z, who took over as president of Def Jam Records last month, hit Miami for a boys night out Jan. 29. He joined Lenny Kravitz and Pharrell Williams at New York Yankee Alex Rodriguez's charity Texas Hold'Em poker tournament. Then the group (minus Kravitz) rolled over to the South Beach hot spot Privé, where Jay came out of retirement by jumping onto a table to lip-synch Mario's R&B hit "Let Me Love You." "He put his hand over his heart, went through all the motions," says one partygoer. "People were loving it." The comeback didn't last long, however: When Jay's own music came on, the hip-hop guru hopped down.

UNIVERSAL CITY Jan. 27 At The Wedding Date's premiere, Amanda Peet reveals she and Ashton Kutcher traded pranks while filming their upcoming comedy A Lot Like Love. After he toilet-papered her front lawn, "I put shaving cream on his car. Twice," says Peet. "I'm waiting to get Punk'd."...L.A. Jan. 31 Cameron Diaz, Drew Barrymore, Lucy Liu and Leonardo DiCaprio, among others, converge on Justin Timberlake's home for a dinner and poker party to celebrate J.T.'s 24th birthday.

Wilmer Valderrama (right) crossed cultures for his 25th birthday Jan. 30, throwing a Latin-themed party at his new Japanese eatery, Geisha House, in Hollywood. While partygoers sipped sake-and-lychee-fruit martinis, a four-piece mariachi band serenaded Valderrama and his 500 guests, including Danny Masterson and Laura Prepon (both investors in the restaurant), Topher Grace, Scarlett Johansson, Jessica Biel and Gabrielle Union. The birthday boy, who busted open a swan-shaped piñata, puffed on a cigar and watched as Erika Christensen, Jack Osbourne, Leelee Sobieski and Dulé Hill danced to hip-hop tunes. Later a burlesque troupe treated Valderrama—single since splitting with Lindsay Lohan in November—to two bump-and-grind numbers.

From Our Partners