Jennifer Lopez: Billboard Music Awards 2013 with Casper Smart!

Jennifer Lopez is joined by her boyfriend Casper Smart while walking the blue carpet at the 2013 Billboard Music Awards held at the MGM Grand Garden Arena on Sunday (May 19) in Las Vegas.

The 43-year-old entertainer is set to perform her song “Live It Up” during the show this evening!

PHOTOS: Check out the latest pics of Jennifer Lopez

FYI: Jennifer is wearing a Zuhair Murad dress, Christian Louboutin shoes and bag, and Le Vian jewelry.

15+ pictures inside of Jennifer Lopez and Casper Smart at the 2013 Billboard Music Awards…