Kim Kardashian kicked off her 31st birthday festivities with an intimate dinner at NYC hotspot The Darby on Friday.

The Keeping Up with the Kardashians star, who wore an all-black outfit with an oversized fur vest and a purple wide-brim hat, was surrounded by her sister Kourtney and her boyfriend Scott Disick, husband Kris Humphries, and several close pals including LaLa Vazquez Anthony and Joyce Bonelli.

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Also in the room but not at Kardashian's table: ex-beau Nick Lachey and singer Pink, who sang "Killing Me Softly with His Song" on her own with the help from the house band.

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An insider tells Us Weekly that at one point, the band's frontman put Kim and Kris unexpectedly on the spot.

"We're so glad that we get to spend our evening with Mrs. Kim! Hold her! Tell her you love her!" he instructed Kris from the stage. The NBA player smiled and grabbed Kim, lifting her off the ground. Then after he hesitated awkwardly, Kim stepped in and yelled into the mic, "I love him!" followed by a hug and a kiss. They both smiled and sat down, both obviously a little embarrassed at being spontaneously put in the spotlight.

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The evening ended with the band delivering a birthday cake to Kim's table, followed by the room singing "Happy Birthday," which was led by Lala.

Kardashian will continue her birthday weekend with another bash in Las Vegas Saturday.

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