Jennifer Lopez: It's My Party and I Will Cry If I Want To!

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Jennifer Lopez was very upset that guest arrived late at her surprise 40th birthday bash Saturday night. Although the actress' pals showed up at the Edison Ballroom for "An Evening With Lola." Lopez was visibly upset by some of the guest tardiness.

Or so says spies who attended the second part of her 40th birthday party at the Edison Ballroom in New York City on Saturday night. According to The New York Daily News, Lopez “threw a fit” when guests were late to dinner. Lopez was “fuming…visibly upset and embarrassed” when the dinner started and some of her guests were tardy.

Lopez was also upset that best friends Tom Cruise and Katie Holmes didn't attend - they were busy hanging out with David and Victoria Beckham in L.A.

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