"American Idol" finalists Kris Allen and Adam Lambert will be opening up for a few music legends.

Is it Wendy or Cyndi?

Cyndi Lauper, Lionel Richie, Carlos Santana, Queen Latifah, Black Eyed Peas and Keith Urban are among the artists scheduled to perform on Wednesday's finale before either Allen or Lambert is crowned the eight season champion. Previous "Idol" winners David Cook and Carrie Underwood will also croon on the two-night finale.