Beyonce Rocks Midriff-Baring Shirt, Shows Off Toned Abs At Kanye's Birthday Party

Access Hollywood
Beyonce spotted leaving Kayne West's birthday party at Miss Lily's on June 8, 2013 in New York City -- Getty Premium
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Beyonce spotted leaving Kayne West's birthday party at Miss Lily's on June 8, 2013 in New York City -- …

If Beyonce is pregnant, she sure is hiding it remarkably well!

The 31-year-old superstar -- who has been the subject of pregnancy rumors for weeks -- showed off her abs in a midriff-baring ensemble at Kanye West's birthday party in New York City on Saturday night.

Beyonce wore a black and white striped, body-hugging skirt with a matching, long-sleeved crop top - revealing her petite and very toned, muscular stomach.

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Also on hand for the bash was Bey's husband, Jay-Z, along with rapper Nas and Kourtney Kardashian's beau, Scott Disick.

Kim Kardashian was not able to make it to her boyfriend's party as she is too far along in her pregnancy to fly, according to Us Weekly.

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The reality star did wish her man a happy 36th birthday via Twitter, however, Tweeting, "Happy Birthday to my best friend, the [love] of my life, my soul!!!! I love you beyond words!"

-- Erin O'Sullivan

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