The University of Wisconsin MadHatters, based out of Madison, Wisconsin, are the premier men’s a cappella group of the UW campus. Founded in 1997, the MadHatters were the first of its kind at UW and have seen their humble beginnings boom into sold out shows across campus filled with adoring fans. Comprised of 14 singers and a vocal percussionist, the MadHatters croon the songs of decades past to the Top 40 present.