Hold Right on the D-pad and hit "Start" - All Miis will be wearing "Wii Music" T-shirts
Hold B button and Down on the D-pad and hit "Start" - All Miis will be wearing Black Belt costumes
Hold Left on the D-pad and hit "Start" - All Miis will be wearing cat costumes
Hold B button and Left on the D-pad and hit "Start" - All Miis will be wearing cheerleadeer costumes
Hold B button and Right on the D-pad and hit "Start" - All Miis will be wearing DJ/beat boxer costumes
Hold Down on the D-pad and hit "Start" - All Miis will be wearing dog costumes
Hold B button and Up on the D-pad and hit "Start" - All Miis will be wearing rapper costumes
Hold Up on the D-pad and hit "Start" - All Miis will be wearing tuxedos