Katy Perry joined theX Factor judging panel today as a guest judge at the Dannii Minogue
turned up at the auditions with fellow judge Cheryl Cole and was met by screaming crowds at the Irish venue.
Perry wore a silver and turquoise mini-dress and purple stilettos took to Girls Aloudstar Cheryl wowed her adoring fans wearing a khaki sleeveless playsuit and long gold earrings stop to sign autographs for the waiting crowd.
As well as Katy, Simon Cowell, Louis Walsh and Chezza have also previously been joined by Geri Halliwelland Natalie Imbrugliawho were booed by fans while Pixie Lott will also guest judge in the near future.
Katy also hit the headlines today after posing topless for Esquire magazine which we are pretty sure received no boos at all.