MAXX Factor is the barbershop quartet that won the Sweet Adelines International Quartet Championship for 2011 on October 22, 2010, in Seattle, Washington. SAI, "one of the world's largest singing organizations for women", has members over five continents who belong to more than 1,200 quartets. The quartet competed with seven other a cappella groups in the first season of The Sing-Off reality television show in December 2009, before being eliminated in the third of four episodes.