Siobhan Magnus is safe in "American Idol."

The Irish American singing sensation from Cape Cod - who counts Alicia Keys (above) as a new fan - has made it through to the next round of "American Idol."

Alicia helped Siobhan on her “inspirational’’ song, a cover of “When You Believe’’ by Mariah Carey and Whitney Houston.

“She’s doing things that I don’t think most people can do," said Alicia advising her to milk her higher register, calling it her “money spot.’’

Alicia herself sounded hoarse on her live spot on the show but still sang two songs.

"Idol" contestant Crystal Bowersox was an early safety, up against Casey Jones who was the first casualty of the night.

He was soon joined by Aaron Kelly and then Tim Urban after Michael Lynche and Siobhan Magnus were saved.

The two-hour special was billed "American Idol Gives Back" and raised money for charity in the U.S. and overseas.

Ryan Seacrest kicked off the show with a video greeting from President Barack Obama and First Lady Michelle Obama.

"American Idol has always been about changing lives -- on the stage and around the world," Obama said.

The First Lady got the last word - and wise words they were. She told Simon to "be nice"!

Elton John joined Alicia Keys, Carrie Underwood, The Black Eyed Peas, Annie Lennox, Jeff Beck & Joss Stone and Mary J. Blige to perform on the night.

The charities who benefited from last night's show were the U.N. Foundation, Save the Children, Malaria No More and the Children's Health Fund.