Jennifer Lopez, 42, has just filmed a new music video using a stunt double who looks amazingly like the diva, despite being a man. The video, for her new single "Follow The Leader," was filmed in Acapulco last weekend. The two were dressed identically in black leggings and tight black jackets. They also sported hair with side braids, although it appears the double, who wasn't named, was wearing a wig. Jennifer's 24-year-old boytoy, Casper Smart, whom she hired to direct the video, was also spotted getting cozy with Lopez on the set and feeding her donuts in between takes.