Maroulis' concert is scheduled to begin at the downtown venue at 9:30 PM.

A Brooklyn native, Constantine Maroulis is a graduate of both the Boston Conservatory and the Berklee College of Music. He trained as an apprentice at the Williamstown Theatre Festival and appeared as Roger in a tour of Rent. In addition to his performances on "American Idol," he has also been seen on "Law & Order: SVU" and in several independent films. Maroulis played an engagement at the Public Theater's Joe's Pub as well as a stint in Broadway's The Wedding Singer and Off-Broadway's Jacques Brel Is Alive and Well and Living in Paris. He was recently seen in the Premier Theatre Company's production of Jesus Christ Superstar.

Maroulis currently stars in Rock of Ages, which plays Off-Broadway's New World Stages. It was recently announced that Rock will begin previews at Broadway's Brooks Atkinson Theatre in March 2009.

Joe's Pub is located within the Public Theater at 425 Lafayette Street. For tickets, priced $20, call (212) 967-7555 or visit www.joespub.com.