Actress and singer Janet Jackson poses with Tyler Perry, who co-starred, wrote and directed their new film "Why Did I Get Married ?" at the film's premiere in Hollywood, California October 4, 2007.(Xinhua Photo)

    LOS ANGELES, Oct. 14 (Xinhua) -- "Tyler Perry's Why Did I Get Married?," starring pop star Janet Jackson debuted at the top of box office in North America this weekend with 21.5 million U.S. dollars, according to preliminary figures released Sunday.

    In Tyler Perry's latest film, Jackson and Perry play a couple who are among the four married couples gathering for a reunion weekend at a snowy cabin.

    The romantic comedy took in more than the combined total of films starring Oscar winners George Clooney and Cate Blanchett and ended the two-week dominance of box office by Disney family comedy "The Game Plan," which slipped to No. 2 with 11.5 million dollar.

    Clooney's legal drama "Michael Clayton" was in third with 11 million dollars, after expanding to over 2,500 theaters from last weekend's 15 theaters. It earned almost the same as the debuting crime drama "We Own the Night," starring Oscar nominee Joaquin Phoenix and Mark Wahlberg.

    Ben Stiller comedy "The Heartbreak Kid," last week's No. 2, slipped to fifth with 7.4 million dollars in its second weekend, followed by Blanchett's historical drama "Elizabeth: The Golden Age," which debuted with a disappointing 6.2 million dollars. 

Actress and singer Janet Jackson poses as she arrives at the premiere of her new film, "Why Did I Get Married?", in Hollywood, California October 4, 2007.  (Xinhua Photo)