performing "B.A.B.Y" (season 2 episode 12) Charlotte Martin, as Petula Clark performing "Downtown" (season 2 episode 13) Nick Lachey, as Tom Jones, performing "It's Not Unusual" (season 2 episode 13) Chris Isaak, as Roy Orbison, performing "Pretty Woman" (season 2 episode 14) Jennifer Love Hewitt, as Nancy Sinatra, performing "Sunny" (season 2 episode 14) Tyler Hilton, as a folk singer, performing The Beatles' "I've Just Seen a Face" (season 2 episode 14) Ricky Fante, as Wilson Pickett, performing "Land of 1000 Dances" (season 2 episode 15) Liz Phair, as Jackie DeShannon, performing "When You Walk in the Room" (season 2 episode 16) Tyra Banks, as a member of The Velvelettes, performing "He Was Really Sayin' Somethin'" (season 2 episode 17) Evan & Jaron, as The Everly Brothers, performing "Wake Up Little Susie" (season 2 episode 17) Jason Mraz, as Dion DiMucci, performing "Ruby Baby" (season 2 episode 18) Fefe Dobson, as Tina Turner, performing "River Deep - Mountain High" (season 2 episode 18) Wyclef Jean, as Curtis Mayfield, performing "Woman's Got Soul" (season 2 episode 19) Season three Brandy Norwood, as Gladys Knight, performing "I Heard It Through the Grapevine" (season 3 episode 1) Nicole Richie, as the lead singer of The Exciters, performing "Tell Him" (season 3 episode 2) Hawk Nelson, as The Who, performing "My Generation" (season 3 episode 3) Phantom Planet, as The Zombies, performing "Tell Her No" (season 3 episode 6) Fantasia Barrino, as Aretha Franklin, performing "Respect" (season 3 episode 8) Otis and the Elevators, as Jimmy Smith, performing "Got My Mojo Working" (season 3 episode 8) Kelly Clarkson, as Brenda Lee, performing "Rockin' Around the Christmas Tree" (season 3 episode 9) JoJo, as Linda Ronstadt, auditioning for Bandstand with "That'll Be The Day" (season 3 episode 9) 112 as The Four Tops, performing "Reach Out, I'll Be There" Van Hunt, as Jimmy Ruffin, performing "What Becomes of the Brokenhearted" (season 3 episode 12) John Legend, as Stevie Wonder, performing "Uptight (Everything's Alright)" (season 3 episode 15) Fountains of Wayne, as The Hollies, performing "Bus Stop" (season 3 episode 16) Performances at the Vinyl Crocodile India.Arie, as Nina Simone, performing "Come Ye" (season 1 episode 15) Keb 'Mo, as Son House, songs performed currently unknown. (season 1 episode 12) Performances at the Lair John Ondrasik from the band Five for Fighting, performing a folk arrangement of his 2004 recording "If God Made You" Art Alexakis,