セラーからのコメント :
CD Single 1 Back It Up (Radio Mix) (4:01), 2 Back It Up (Stone&Johnny Boy Club Mix) (7:35), 3 Back It Up (Original Club Mix) (6:03), 4 Back It Up (Original Dub Mix) (5:21), 5 Back It Up (Unit 27 Club Mix) (6:20), 6 Back It Up (Unit 28 Club Mix) (5:21)
