Denise Truscello/WireImageKim Kardashian kicked off her 2011 by giving partygoers at Tao a sneak peek of her new single!
After the E! reality star did the countdown during the party she hosted in Las Vegas, she got on the mic and introduced her song, even singing along to the untitled track.
So does Kimmy K have a hit single on her hands?
"Fans screamed and snapped photos of Kim as she partied to her new song," a source says.
You can hear the song and check out the crowd's reaction yourself in the video below.
Kim also had video cameras on hand to shoot club scenes for the accompanying music video, which will reportedly feature Kanye West.
Meanwhile, Kanye was busy putting on a show himself that night, where he was a surprise performer along with Jay-Z and Coldplay at the star-studded opening of the Cosmopolitan.