"American Idol" contestants will face a new challenge Tuesday night, when they meet up with Broadway composer Andrew Lloyd Webber. He will not only mentor the six remaining singers, but they will all perform a selection of his songs from the set of "Phantom the Las Vegas Spectacular" at the Venetian Hotel, Las Vegas.

Webber is a world-renowned composer who has a long list of credits to his name including "The Phantom of the Opera," "Joseph and the Amazing Technicolor Dreamcoat," "Evita" and "Jesus Christ Superstar." His list of awards is even longer but includes seven Tonys, three Grammys, seven Oliviers, a Golden Globe, an Oscar and two International Emmys.

Webber grew up in West London and in 1992 was knighted by the Queen. In 1991, Webber became the first and only composer to have six productions running in the West End at the same time.

The six remaining Idol contestants will perform Webber's songs on Tuesday night and then Webber will sing with them on Wednesday night's elimination show.

"American Idol" airs on FOX on Tuesday at 8/7c.