The singer/dancer/producer has five Grammys to his name. He's also sold over 15 millions copies of the album, "Confessions." Nevertheless, Usher sees his Broadway debut in Chicago as a whole different beast; or relationship, as the case may be.

"Broadway is like a monogamous relationship," the R&B star, told People. "Doing anything else, like acting in Hollywood � which is great � it's like a one-night stand. You do it and then you keep moving."

At that, Lindsay Lohan nodded her head in agreeance.

The role of Billy Flynn, which Usher now shines in, was originally created in the 1975 production by Jerry Orbach � long before the late actor became a household name on TV's Law & Order � and then played by Richard Gere in the 2002 Oscar-winning best picture.

Opening night this week brought out stars such as Penelope Cruz, Gabrielle Union, Clive Davis, and Rosie Perez. And, of course, the most proud fan in attendence: Usher's mom, Jonetta Patton.

"I thought his performance was unbelievable. Absolutely incredible. I am so so, so happy," she said.