Iron Man was once again the top movie at the box office, even though its gross receipts dropped by about 50 percent domestically. After opening with a huge $100 million weekend last week, the Marvel Enterprises production held on to its title as the No. 1 movie in America with $50.5 million in ticket sales this week despite strong competition from a couple of new films.

One was the highly anticipated Speed Racer from the Wachowski brothers, a movie that was blasted by critics and viewers alike as it sputtered to a $20.2 million opening — good enough for second place.

The other was What Happens in Vegas…, a comedy starring Cameron Diaz and Ashton Kutcher. This movie was similarly panned by critics and audiences, but still managed to sell $20 million worth of tickets.

Last week’s No. 2 film, Made of Honor, dropped a couple places to No. 4 with just $7.6 million in sales. The only other new entry on the list was Redbelt, which slipped into the tenth spot at $1.14 million.

Here’s the complete Top 10 for the week ending 5/11/08:

  1. Iron Man, $50.5 million
  2. Speed Racer, $20.2 million
  3. What Happens in Vegas…, $20 million
  4. Made of Honor, $7.6 million
  5. Baby Mama, $5.77 million
  6. Forgetting Sarah Marshall, $3.78 million
  7. Harold & Kumar Escape from Guantanamo Bay, $3.15 million
  8. The Forbidden Kingdom, $1.9 million
  9. Nim’s Island, $1.32 million
  10. Redbelt, $1.14 million