How to Train your Dragon reclaims US top spot
The film took over $15 million (£9.7 million), putting it ahead of new film The Back-up Plan.
Starring Jennifer Lopez, the film centres on a woman who conceives twins through artificial insemination, only to meet the man of her dreams on the very same day.
Date Night remained at three, while new film The Losers opened at four. The film, which stars Zoe Saldana, Chris Evans and Jeffrey Dean Morgan, focuses on a team of CIA black ops members who target the people who betrayed them.
Last week's number one Kick-Ass fell four places to five, while Clash of the Titans slipped two places to six.
Death at a Funeral took the seventh place, with new film Oceans opening at eight.
The Last Song and Alice in Wonderland rounded off the list.