j-lo-caper-460.JPGBryan Steffy/WireImage

Jennifer Lopez and boyfriend Casper Smart attended the late show of Mystere by Cirque du Soleil at Treasure Island Las Vegas last night, and even though the May/December couple got all dolled up, they took it easy and munched on popcorn and candy during the performance.

Lopez is in Las Vegas with ex-hubby Marc Anthony for the Q’Viva! The Chosen Live concert at Mandalay Bay, and it seems like the duo have been able to keep it professional at least as far as the cameras are concerned.