Jennifer and Mark Show El Cantante to Vegas

J-Lo and Marc were quick to put to bed any troubled marriage rumors by looking as happy and in love as ever last night. The two were in Sin City to show off their latest project, El Cantante, to a panel for ShoWest 2007 at the Paris Hotel. The film doesn't officially come out until August 1, but has already generated some Oscar buzz for Ms. Lopez. Jennifer looked stunning and even opted for one of the recent runway trends, high-waisted pants. Marc, on the other hand, well we maybe would prefer that he button up his shirt a little more next time.