Katy Perry Tweeted THIS photo from American Idol.

She is wearing the Sylvia Toledano Torque Cross Necklace and Alaia Panther Print Velvet Jacquard Gown!
Get the look for less here:
#KatyPerry #crossnecklace #pantherprint #pantherprintdress #leopardprint #leopardprintdress #animalprint #animalprintdress #AmericanIdol #SylviaToledano #Alaia #halterdress #haltergown