Jordin Sparks, Katy Perry

As American Idol inches closer to crowning a new champ, a former winner will return to the stage for an encore.

On the May 13 results show — in which either Adam Lambert, Danny Gokey or Kris Allen will be sent home — your Season 6 American Idol, Jordin Sparks, will perform her new single "Battlefield" (which, let's face it, is what the Idol stage becomes at this time of year).

Also putting on a show that night will be Katy Perry. She'll be singing "Waking Up in Vegas," the latest single from her platinum debut disc One of the Boys.

For the latest on American Idol, tune into TV Guide Network's Idol Tonight every Wednesday at 8 pm/ET and Idol Wrap every Friday at 8 pm/ET with co-hosts Kimberly Caldwell and Justin Guarini. Plus get more on your favorite Idols every Friday with American Idol Rewind at 7 pm/ET.