As always, the celebrities were out and about this weekend, and "Extra" had them covered. From Whitney Houston's Hollywood appearance to Tom Cruise's star-studded big bash, we were on the scene.

Whitney Houston was all smiles at one of her first Hollywood appearances since leaving rehab, as she, along with Bobby Brown and daughter Bobbi Kristina, attended the premiere of "The Princess Diaries 2;" Whitney's one of the movie's producers.

Marcia Gay Harden, Raven and Joe Pantoliano joined the film's stars Anne Hathaway, Julie Andrews, and Hector Elizondo on the red carpet, where all the talk was about Andrews and her brief return to singing in the movie.

"She was unbelievable, nobody can carry a song like her," Hathaway told us.

And Andrews added, "I'm thrilled to be doing it." We also found out there may already be a "Princess Diaries 3" in the works.

Tom Cruise was one of the headliners at the Scientology's Celebrity Centre 35th Anniversary Gala in Hollywood this weekend. John Travolta and wife Kelly Preston, Brandy, Leah Remini and Jenna Elfman also attended the event.

Sexy Pam Anderson looked stunning at this weekend's signing of her new book, "Star: A Novel." Although Anderson's first book is fiction, she admitted much of the book was based on her wild life, lovers and sexual experiences.

"It's a sexy book," she confessed. "Maybe people might be able to pick some things out of there that are similar to my life." Pam also revealed that she's planning a sequel, and is launching her own clothing line in the fall."

Sugar Ray's Mark McGrath guest stars on FOX TV's "North Shore" Monday night, giving Brooke Burns' character a shot of courage to deal with her love life problems. Check it out for yourself Monday at 8 p.m.