 Queen Latifah hosted the show from the Pasadena Civic Center in Los Angeles, where The Black Eyed Peas, Elton John, Carrie Underwood, and Joss Stone appeared at the Pasadena Civic Center, while Alicia Keys, Victoria Beckham, and David Cook appeared at the American Idol studio.Mary J. Blige also appeared at the American Idol studio, with an all-star band featuring Orianthi, Travis Barker, Randy Jackson, and multiple other celebrities.Annie Lennox was scheduled to make an appearance and perform live on the show, however, the eruption of the Icelandic volcano Eyjafjallajökull which began on April 14, 2010 caused chaos across Europe with every flight being grounded.