‘Idol Gives Back’ performers & presenters: Season 7

Amy Adams  (Jay L. Clendenin / Los Angeles Times)

Bono of U2  (Jo Hale / Getty Images)

Reese Witherspoon  (Matt Sayles / Associated Press)

Carrie Underwood  (Lawrence K. Ho / Los Angeles Times)

Elliott Yamin  (Gina Ferazzi / Los Angeles Times)

Ashley Tisdale  (Myung J. Chun / Los Angeles Times)

Fergie  (Mark J. Terrill / Associated Press)

Vanessa Hudgens  (Lori Shepler / Los Angeles Times)

Gloria Estefan  (Carlos Alvarez / Getty Images)

Ann, left, and Nancy Wilson of Heart.  (Gary Friedman / Los Angeles Times)

Maroon 5  (Peter Kramer / Associated Press)

Snoop Dogg  (Matt Sayles / Associated Press)

Annie Lennox  (Lori Shepler / Los Angeles Times)

Daughtry  (Jim Cooper / Associated Press)

Kiefer Sutherland  (Frazer Harrison / Getty Images)

Dane Cook  (Bryan Bedder / Getty Images)

Celine Dion  (Bradley Kanaris / Getty Images)

Robin Williams  (Damon Winter / Los Angeles Times)

Brad Pitt  (Chris Pizzello / Associated Press)

Billy Crystal

Click here for ‘Idol Gives Back’ performers & presenters: Season 6  (Richard Hartog / Los Angeles Times)