They should not be allowed on the Groups' backingtracks! It completely defeats the purpose of a vocal harmony group for harmonies to be pre-recorded and mixed into the track, it gives a completely false impression of the Group! Like an unfair advantage!

How do you think Wand got so far?

Sadly, now-a-days in pop music a live performance is rarely 100% live. In fact, I don't think people know what 100% live means anymore. There's usually always some sort of backing vocal track used.

It's lazy but a lot of artists cheat and use them now.

Wand Erection were 98% backing vocals, the little shites.