Constantine Maroulis, Elliott Yamin Prepare for Soap Opera Performances

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Soap Stars
Past American Idol finalists Elliott Yamin and Constantine Maroulis will be sharing the stage along with singer-songwriter Jon McLaughlin for a concert in an episode of The Bold And The Beautiful airing tomorrow.

Maroulis, who plays record promoter Constantine Parros on the daytime drama, will be joined by fellow cast members Mackenzie Mauzy and Kyle Lowder.

The concert is tied in to an online contest called "Boldface Challenge" which ran in the first few weeks of August.

Viewers were invited to choose between duets by Maroulis' character with his young protegee, Phoebe Forrester (Mauzy) and Phoebe's duet with her former boyfriend, Rick Forrester (Lowder). Videos of each duet were posted on the site of Parros' fictional record company, Boldface Records.

Viewers, who voted by text or online, were automatically entered into a sweepstakes for various prizes and a grand prize of a trip for two to Los Angeles to visit the site of the popular daytime drama.

The grand prize winner of the sweepstakes will be announced on Friday's episode, while the duet challenge winner will be announced on Monday.

During the concert, Yamin will perform his single, "Wait For You," McLaughlin will perform "Beautiful Disaster" and Maroulis will present his rendition of Celine Dion's hit "Fading Into You."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.