Check Out Susan Boyle's Makeover

updated 07/22/2009 AT 07:50 AM EDT

originally published 07/18/2009 AT 04:45 PM EDT

"You look gorgeous, I'm loving the hair!"

That's Meredith Vieira of the Today show's reaction to a newly elegant Susan Boyle, who will make her U.S. debut Wednesday night on America's Got Talent – sporting a new hair color, softer locks and expert makeup.

"I brush up quite well," is Boyle's typically bashful reply.

On Wednesday morning's Today, Vieira asked Boyle – who declined to reveal any of the song titles or even the style on her soon-to-be-released CD – to describe the incredible ascent that began with her audition for Britain's Got Talent, her second-place finish on the show, a U.K. tour and now her debut in America.

"I'm having a wonderful time," says Boyle. "It's just been unbelievable ... It's a bit like going on a long journey. You don't know what's going to happen. You don't know where it's going to end."

"I don't want it to end," she says. "It's like being plucked form obscurity."

As for what her late mother would be saying to her now-famous daughter, Boyle says her advice would be, "Susan, keep going."

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