The blonde beauty admitted last week (ends31Mar13) she was facing her phobia in the show, and she made it through the first round of the competition.
However, she pulled out of performing her routine from a 23 foot (seven metre)-high platform on Tuesday's (02Apr13) episode after her fears got the better of her.
She said, "I'm so sorry, everybody. This is the first time in my life I've quit something. This will haunt me for the rest of my life."
In a post on her Twitter.com page, she added, "Damn I got a lot of hate tonight but ill (sic) take it. Big mistake signing up for the show. Sorry I let you all down."