Janet Jackson

Janet made a surprise performance on Wednesday May 26 as part of American Idol's Season 9 Finale. Janet joined the top 12 Idol contestants in singing part of 'Again' from 'janet.'(1993), before making her debut performance of 'Nothing,' the original theme song from 'Why Did I Get Married Too?', followed by her classic 'Nasty' from 'Control'(1986).

Janet's performance on American Idol is now available on iTunes!

MTV.com: Janet Jackson Sings 'Nothing,' Gets 'Nasty' On 'American Idol'