Kim Kardashian Lets Loose at Beyonce Concert

After a whirlwind trip to Cannes, France last week and losing sentimental items and trust to TSA on her trip home, Kim Kardashian was looking to let loose.

So she did. The Keeping Up with the Kardashians star made a beeline for Beyonce's concert at Revel's Ovation Hall in Atlantic City, N.J., on Sunday night.

In addition to dancing and singing along to Bey's chart-topping hits, Kim got a chance to chat with the woman of the evening herself backstage. OMG!

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The two have plenty to discuss, of course. Beyonce's husband of four years, Jay-Z, is best friends with Kanye West, Kardashian's serious boyfriend.

Says a source klose to Kim:

"Kim thought it was such a great show. There's always some random rumors there is tension between them and there totally isn't! Kim had so much fun."

B's concert weekend, her first since becoming a mom, drew many big names. Michelle, Sasha and Malia Obama were among other notable attendees.

During Saturday's performance (she did four shows there), Beyonce revealed that she's lost 60 pounds since giving birth to baby Blue Ivy Carter.

"Y'all have no idea how hard I worked! They had me on that treadmill. I ate lettuce!" she told her fans. "Now tonight I'm gonna get chocolate wasted!"

That's probably what Kim says about ... chocolate also.

[Photos: WENN.com]