Susan Boyle

After becoming a YouTube sensation earlier this year and with her debut album burning up the charts, Susan Boyle says her success has been "humbling."

"I feel as if I don't want my dream to end," Boyle, 47, told The Early Show Friday morning after performing Les Miserables' "I Dreamed a Dream."

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The tune — with which she auditioned for Britain's Got Talent and subsequently became a household name — is also the title track of her debut album. Released Tuesday in the U.S., I Dreamed a Dream is already a No. 1 seller in the UK.

Boyle will next be seen in her own hour-long special on the TV Guide Network. Susan Boyle: I Dreamed a Dream will chronicle her rise to fame from rural Scotland to YouTube sensation and will include interviews with friends, fans and Boyle herself. The special airs Sunday, Dec. 13 at 8/7c.