American Idol didn’t get the audience reaction they anticipated on Thursday nights episode.

The crowd was screaming in anticipation of Katy Perry’s performance and was greatly disappointed when it turned out to be a pre-recorded rendition of Part Of Me.

According to E! Online, the stage manager and audience coordinator thought it would be a good idea to tease fans, saying,  "Should we tell them? Do you want to tell them? OK, let's just let it be a surprise."

This turned out to be a bad idea as fans broke into excessive booing while being very vocal about their disappointment.