Donny Osmond Makes Susan Boyle Blush

International singing sensation Susan Boyle finally gets the chance to perform a live duet with her lifelong idol Donny Osmond on tonight's Dancing with the Stars and only ET's Chris Jacobs was with the pair right after their final rehearsal before the show!

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The duo -- set to sing This Is The Moment while DWTS pros Kym Johnson, Tristan MacManus, Anna Trebunskaya and Henry Byalikov dance -- told Chris that rehearsals went well and they are ready for their big live debut. This is The Moment is off Susan's new album, Standing Ovation, which is set for release on November 13.

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"Susan told me that when she was a little girl she would listen to my albums -- she would go in a room and sing along with me," revealed Donny, who himself won the 9th season of Dancing with the Stars in 2009. "And she said, 'Someday I want to sing with Donny Osmond.' Tonight's that night." For her part, Susan said she still hardly believes that her childhood dream to sing with Donny is finally coming true. "I've got to pinch myself. It goes back to that time when I was 13."

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In addition to tonight's Dancing with the Stars performance, the two will also team up Wednesday night to perform a duet in Las Vegas for the Donny & Marie Show at the Flamingo.

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Watch the video for more of the interview, including a blushing moment for Susan when she talks about cherishing her whole life a blanket with Donny's face on it.