Rihanna, Pharrell and Enrique Iglesias lent their musical expertise on Wednesday night’s (Oct 12) episode of “The X Factor.”

Rihanna joined X Factor judge L.A. Reid at his home in the Hamptons mentoring the boys, and Pharrell was over at Paula Abdul‘s house helping her out and mentoring the groups.

Nicole Scherzinger got some help from her friend Enrique Iglesias, who critiqued the contestants aged over 30, while Simon Cowell‘s guest judge Mariah Carey was unable to fulfill her duties due to her flight being grounded because of Hurricane Irene.

Watch Rihanna, Pharell and Enrique Iglesias guest judge on the X Factor below:

L.A. Reid & Rihanna

Brian Bradley

Skyelor Anderson

Nick Voss

Nicole Scherzinger & Enrique Iglesias

Dextor Haygood

Elaine Gibbs

James Kenney

Paula Abdul & Pharrell Williams

The Anser

4Shore

Lakoda Rayne

The Brewer Boys

Simon Cowell & Mariah Carey (No-Show)

Tora Woloshin

Caitlin Koch

Drew Ryniewicz