THE SCREENING ROOM: Jessica Simpson Performs "The Music and the Mirror" in A Chorus Line (Video)

If the Tony Award-winning Best Musical A Chorus Line dances its way back to Broadway, pop star Jessica Simpson will be waiting in the wings. Here is a clip of Simpson as Cassie in the iconic musical, which features a score by the late Marvin Hamlisch.

"The ultimate #tbt [Throwback Thursday]," Simpson tweeted May 30 along with a YouTube video of her performance of "The Music and the Mirror."

Donna McKechnie originated the role of Cassie in the 1975 musical, earning a Tony Award for her performance. A Chorus Line was revived on Broadway in 2006 with Charlotte d'Amboise as Cassie; she received a Tony nomination for her performance. 

Watch Simpson's full performance below: