Reality TV
Rex Features
The Hills star was cheered on by fans at the Bahamas event as she performed her new single 'Body Language', taken from her upcoming debut album.
However, it has been reported that broadcaster NBC blocked out half of her performance as it introduced the 15 finalists.
Speaking before the show, the 22-year-old said: "I think people don't know what to expect and how can they? It's my first performance live and it's in front of a billion eyes.
"I'm very excited to show everyone what I'm coming with. I'm very excited for everybody to see this. I think a lot of people are expecting something very different."
Miss Venezuela Stefania Fernandez was crowned the winner of the 2009 Miss Universe pageant, marking the second year in a row that the South American country has scooped the crown.
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