Here's an inside look at Kim Kardashian's 31st birthday celebration with her best friends and husband Kris Humphries at The Darby in New York City. Kim was also joined by her sister Kourtney, who brought boyfriend Scott Disick. The group had a blast and all cracked up when Kim's best friend, La La Anthony sang a Stevie Wonder version of "Happy Birthday!" as the spotlight was shined on her from the stage. Kim and Kris looked very much in love and shared many kisses throughout the evening, celebrating two months of marriage in addition to Kim's birthday. Kim was celebrating her 31st birthday when Pink's surprise concert became one of the highlights of the night! October 22, 2011.