Usher dampened thousands of panties on Saturday night at the Sprint Center. In a venue filled to the brim with screaming women, the R&B crooner launched a set as well-oiled and tight as his abs. "I'm just beside myself when I'm let out of my cage," Usher said to Kansas City's ladies. "Would it be okay if I just take my time with every one of you beautiful women tonight?" The deafening response of roaring cheers was an answer in itself. Check out the slideshow of Usher's moves (and radio prodigy Trey Songz) after the jump.