NEWS FLASH! Kim Kardashian Silences Butt Implant Rumors With Cheeky "FlashBACK Friday" Photo

That's one way to silence the haters! Kim Kardashian further disproved rumors that she recently received butt implants by posting a cheeky flashback Friday photo highlighting her most famous asset -- her bodacious booty -- from an event five years earlier.

PHOTOS: Kim's best booty moments

   

    

     

     

     

     

     

The 33-year-old reality star shared the picture via Twitter on Friday, Feb. 21. It shows her posing on the red carpet with her back to the camera, her derriere on display in a clingy, super-short turtleneck dress. "#FlashBACKFriday lol," she jokingly captioned the snap, which was taken at SlimFast's Style Your Slim event on Jan. 8, 2008.

The flashback Friday post comes on the heels of Kardashian's extended Twitter rant earlier this week, in which she slammed reports that her famous curves are fake. "I'm seeing all these nonsense tabloids claiming I have butt implants-injections. Get a life!" the engaged star tweeted Wednesday.

PHOTOS: Kim's sexy post-baby bikini body

The first-time mom went on to note that she "still has weight to lose" from her pregnancy with daughter North West, born last June. "Anyone who has had a baby knows how hard it is to lose weight (especially the last bit of weight) & your body totally changes!" she wrote. "I'm not perfect but I will never conform to your skinny standards, sorry! Not me. And BTW I've lost a lot so far & I'm proud of that!" she added.

PHOTOS: Kim's pregnancy style

Kardashian has indeed worked hard to get back in shape since giving birth last summer -- and it's paid off. "Kim feels confident again," a source close to Kanye West's fiancee told Us. "She worked really hard and is so motivated to stay fit."