Nicole Scherzinger is to play Mary Magdalene in a UK tour of Jesus Christ Superstar which kicks off this summer at the O2.
The former Pussycat Doll singer will star in the Lord Andrew Lloyd Webber and Tim Rice rock musical alongside Tim Minchin as Judas Iscariot.
ITV1 show Superstar, which has Spice Girl Mel C and Jason Donovan among the judges and Amanda Holden as host, is to choose the actor for the title role.
Lord Webber recently revealed 3,000 would-be singing stars from as far afield as New Zealand and Israel have flown in to try out for the lead role in the musical.
"We had a boy in from New Zealand; a boy from Israel; we had somebody come in from Lithuania," said Lord Webber said.
"I mean it was extraordinary where people are coming from and I think we've had 3,000 people in to audition for the role, including a few girls - one girl who was very, very good and was really terrific."
Lord Webber has previously found stars for West End productions of The Sound of Music, Joseph And The Amazing Technicolor Dreamcoat, Oliver! and The Wizard of Oz through his BBC shows.