Rupert, according to a press statement, "has been ordered by his doctor to be on complete vocal rest other than his commitments to Legally Blonde." Part of the Center's In Concert series, the evening was scheduled to begin at 7 PM.

The In Concert series previously presented Sherie Rene Scott on Dec. 4, 2006, and Douglas Sills, Todd Murray and Sally Wilfert on Jan. 29, 2007.

Alison Fraser received Tony nominations for her performances in Romance/Romance and The Secret Garden, and her other Broadway credits include The Mystery of Edwin Drood and the 1996 revival of Tartuffe. She created the role of Trina in William Finn's In Trousers and March of the Falsettos and reprised that role in the anniversary concert for Playwrights Horizons. Her other Off-Broadway credits include roles in Up Against It, The Green Heart, Beehive and Swingtime Canteen. Fraser also starred in the George Street Playhouse's production of Lips Together, Teeth Apart.

Michael Rupert, who is back on Broadway this season in Legally Blonde, won a Tony and a Drama Desk Award for his work in the revival of Sweet Charity. He also received a Tony nomination for his performance in William Finn's Falsettos, and his other Broadway credits include Ragtime, The Happy Time, City of Angels, Mail, Shakespeare's Cabaret and Pippin.

The LGBT Center is located in Manhattan at 208 West 13th Street, between 7th and 8th Avenues. For more information call (212) 620-7310, ext. 274 or visit www.gaycenter.org.