Despite calling the reality star 'one of the nicest people you'll ever meet' Nick explained that he couldn't forgive her for denying the tape existed.
Radio presenter Nick, now happily married to Mariah Carey, briefly dated Kim from September 2006 to January 2007.
Speaking on The Howard Stern Show last week he explained: 'This was my issue. We talked about this tape…And she told me there was no tape.
'If she might have been honest with me I might have tried to hold her down and be like "That was before me" because she is a great girl.
'She’s actually one of the nicest people you’ll ever meet. But the fact that she lied and told me that there was no tape?'
Nick revealed that he had always suspected that Kim might have had something to do with the tape's release.
'And I still think she might have even had a part to play with [its release],' he said.
It seems unlikely Kim will be too concerned about losing out with Nick, however.
Since their breakup she has gone on to become one of America's biggest stars, despite her lack of talent.
Nick seems to appreciate this, adding: 'I think she's a great businesswoman if you ask me.'
Kim is now happily dating rapper Kanye West.
Her other ex-boyfriends include Gabriel Aubry and Nick Lachey. She is currently locked in a messy divorce with second husband Kris Humphries, after a brief and disastrous marriage.
Kim's rise to fame saw her introduced her to Hollywood's socialite scene by her then close friend Paris Hilton.
Paris soon came to regret the move, as she was overshadowed by Kim when her sex tape was leaked, with pornography company Vivid buying the rights to the video for $1m.
It was particularly galling for Paris, as a similar film featuring her had been leaked in 2003, briefly making her one of the world's most notorious celebrities.
While Kim has always claimed she was 'devastated' by the release of the tape, it certainly made her a star.
It has even been alleged her mother Kris Jenner brokered the deal, with Kim receiving a hefty advance worth between $250,000 and $500,000.
Kim filmed the sex tape when she was 23, and Keeping Up With The Kardashians premiered eight months after its release.
Back in June reports emerged that Kris had allegedly instructed Kim to make the video and even had her re-shoot it because the first take wasn't 'pretty enough'.
Kim’s younger sister Khloe was infuriated by the claims and said: 'That is just disgusting and disturbing, and probably HIS fantasy!'