During her concert at Caesars Palace's Colosseum in Las Vegas on Tuesday night, the 49-year-old singer channeled the Disney movie's heroine, Belle, while singing the ballad for the first time in front of 4,000 people. Dion clearly impressed the audience, including ET's Cameron Mathison, but admitted that she was little uneasy before taking the stage.

"It was very, very nerve-racking for me," she confided to Mathison. "It's because I'm Celine Dion. It's because it's the first, and I wanted to make it right."

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In 1991, Dion also sang the theme song to the Beauty and the Beast animated movie, along with Peabo Bryson. "Beauty and the Beast had put me on the map [over] 25 years ago, and I do respect that tremendously," she noted. "Without sounding pretentious, I want to be as good as possible."