"Cowboys & Aliens" and family fun movie "The Smurfs" have tied for the box office top spot - both films opened at the weekend with $36.2 million.
 
"Captain America: The First Avenger" didn't have enough power to hold onto last week's number one - it fell to third place with $24.9 million.
 
"Harry Potter and the Deathly Hallows: Part 2" raked in $21.9 million to land fourth place, and Ryan Gosling and Steve Carell's new romantic comedy "Crazy, Stupid, Love," rounded out the top five after premiering with $19.3 million.