For me;

Ruby Red Performers
Andrew The Impressionist

Nobody as it would be totally unfair.

All of them except the dog and the choir.

I don't know if I would have buzzed but I found the Ruby Red's, The impressionist, the singing boy and the dance group rather dull at best

Ruby Red Performers
Entity AllStars

agreed

Wonder dog
Lorraine Bowen

Entity all stars

All but Emily and Billy.

Wouldn't have buzzed the choir, dog or roller skaters. Would have buzzed all the others.

I wasn't that impressed by the roller skaters, but wouldn't really want to distract them whilst they were spinning.