premise: There was a song performed on Glee called Rhythm Nation.
hypothesis: `` Rhythm Nation '' is a song by American singer Janet Jackson , released as the second single from her fourth studio album Janet Jackson 's Rhythm Nation 1814 ( 1989 ) . It has been covered by Pink , Crystal Kay , and Girls ' Generation and has also been performed on Glee , The X-Factor , and Britain 's Got Talent .