There's a lot of U.S. celebrities that have been to the Philippines:
Chuck Norris (Delta Force 2)
Tom Cruise (Born on the Fourth of July)
Willem Dafoe (Born on the Fourth of July, Platoon)
Tom Berenger (Platoon)
Martin Sheen (Apocalypse Now)
Charlie Sheen (Platoon)
Marlon Brando (Apocalypse Now)
John Wayne (Back to Bataan)
Anthony Quinn (Back to Bataan)
Gary Cooper (The Real Glory)
Lawrence Fishburne (Apocalypse Now, he was still an unknown actor when he was in this movie)
Dennis Hopper (Apocalypse Now)
Francis Ford Coppola (director of "Apocalypse Now"
Oliver Stone (director of "Born on the Fourth of July" and "Platoon")
Johnny Depp (Platoon, during this film that he mentioned that it is his first time to be outside the United States, and he said he still know some few Tagalog words)
Mel Gibson (The Year of Living Dangerously)
Kate Beckinsale (Brokedown Palace, this lady is so hot, hehehe)
Harrison Ford (Apocalypse Now, he was still unkonwn actor when he was in this movie)
Dylan McDermott (Hamburger Hill)
Claire Danes (Brokedown Palace)
Bill Pulman (Brokedown Palace)
Mandy Moore
Roger Moore
Mariah Carey
Brooke Burke
http://www.youtube.com/watch?v=FGqHoOgsvXQ