At a festival last year a singer was presenting a workshop and had a couple of sweet young things singing chorus with him...when they got halfway through one song the girls collapsed in giggles and couldn't continue singing. They gathered themselves together and tried again...same result. So Duncan told us why - it seems that in rehearsal, instead of singing "furtive parsons" the girls sang "fartive persons" and every time they tried to sing that song they couldn't get near that line without breaking up. Of course after that the audience held their breath but the singers all got it right!
Cheers
JennieG