On the tour at the very least.
I don't get the 'terrible' thing to be honest. They are not great vocals, but the taller one (Reggie?) is half decent at his part, the other guy is a poor singer for sure though. Wand Erection had two decent singers and three pretty bad ones when on the show, didn't do them any harm.
The biggest thing Reggie and Bolie have going for them is the rest of the contestants. As long as they continue to offer the dirge and downbeat versions of songs they have been doing, the uptempo and fun production will always stand out, no matter what the vocals are like.