List of Celebrity Coaches and Guests For American Idol, Season Six

Which celebrity singers will appear on Idol?

• Grammy-winning singer/producer Barry Gibb of The Bee Gees
• Singer/actress Jennifer Lopez
• Scottish star Lulu
• Country singer Martina McBride
• English singer/songwriter/actor Peter Noone
• Pop legend Diana Ross
• Chart-topping singer Gwen Stefani

Past Idols Performing

• Carrie Underwood
• Kellie Pickler