Check Out Cher's Low-Cut Dress at Burlesque Premiere!

Credit: Steve Granitz/

At Monday's L.A. Burlesque premiere, 64-year-old Cher proved that age ain't nothin' but a number, upstaging Christina Aguilera in a sexy, low-cut black frock.

Aguilera (who turns 30 next month) went for a more conservative look, donning an emerald green Elie Saab empire waist silk chiffon gown.

That left all eyes on Cher, who showed plenty of leg and cleavage.

Asked what projects she wants to do next, she told, "I don't know ... I have a belief, what belongs to you comes to you. So whatever happens. I really like to act, I forgot how much I like it. We'll see what happens."

What was it like to do the numbers and be back on stage in the movie (out Nov. 24)?

"That came easy," Cher told Us. "Acting, it took a minute. Halfway in, I was like, 'Oh right, I can do this!'"

And those costumes?

"Getting dolled up is the worst part!" she told Us. "But you get on stage and everyone looks great."