Russian tennis star Maria Sharapova netted all the attention on April 9, when she celebrated her 18th birthday at the Manhattan club Hiro. Among the party girls who came to the fete (sponsored by Motorola) were Lindsay Lohan and Fergie of the Black Eyed Peas, and Maroon 5 entertained with an hour-long set. When the band closed with a cover of AC/DC's "Highway to Hell," everyone got on their feet, including The O.C.'s Samaire Armstrong, Brooke Burns (Bruce Willis's ex) and Survivor sweethearts Jenna Morasca and Ethan Zohn.
MANDY'S SWEET SURPRISE
Wilmer Valderrama, Shannon Elizabeth, Pharrell Williams, Macaulay Culkin and his girlfriend Mila Kunis (That '70s Show) all showed up in Tokyo—yes, Tokyo!—where they helped Mandy Moore celebrate her 21st birthday. Moore was in Japan—as was Williams—to perform at the Coach Play for Peace benefit concert for UNICEF April 9.
SATURDAY NIGHT FEVER
Cameron Diaz and Justin Timberlake must have been wired after their surprise joint appearance on Saturday Night Live April 9, because they wound up partying with the SNL gang and musical guests Green Day until 6 o'clock Sunday morning at the superprivate Rock Candy—a new Manhattan club that didn't officially open to the public until two days later. Diaz and Timberlake (accompanied by a bodyguard) "were very lovey-dovey all night," according to a witness. They also dug the club's guest deejay: Kid Rock. In fact, SNL alum Jimmy Fallon, who hit the dance floor, got so into the music that when Rock—whose real name is Robert Ritchie—played Joan Jett's "I Love Rock'n Roll," Fallon ripped his shirt off and screamed, "I love you, Bobby!"