Watch Out, Christine! Norm Lewis Cheats On His Phantom Muse Sierra Boggess with Audra McDonald

We always thought the Phantom had never-ending love for his main squeeze Christine, but we guess we were wrong! When six-time Tony winner Audra McDonald stopped by to see her former Porgy and Bess star Norm Lewis in The Phantom of the Opera on June 26, his new co-star Sierra Boggess could barely contain her jealousy. Click for pics!