The photo first appeared on TheDirty.com, then on Media Takeout with the caption: "Nude Pic of Kim Kardashian Hits the Net… and It's an Old Pic… Before She Got Her Boobs Done!!!"
Kim's representative is denying that the pic is of Kim. "It's not her. You can totally tell. It looks nothing like her."
Meanwhile, the "Keeping Up with the Kardashians" star made a guest appearance on Thursday night's "30 Rock," alongside "SNL" alums Amy Poehler and Jimmy Fallon.
She came in at the top of the show acting as a Cabletown co-worker who needed to use the restroom. Later, Kim popped in to tell drag queen Paul (Will Forte) that she just caught his marriage proposal to Jenna Maroney (Jane Krakowski) on tape for "14 million people" to see.
The 31-year-old socialite tweeted after the show, "Anyone see 30 Rock tonight??? I had a blast!!!! Love this show!"
Other surprise guests included Jon Hamm and Sir Paul McCartney.
Reality star Kim Kardashian has denied that she's the nude woman seen frying eggs in a recent photo leaked online, reports Daily Mail. The busy mogul found time to appear on last night's episode of "30 Rock."