there are several modern vocal affectations which i find offputting. i'm afraid the lass in the first clip has more than enough to put me off.
Sarah has a great talent, but she has already appeared on talent shows before and the chances are that the production team approached her. I love the fact that unknown talent can get a showing, but hate the staged "off the street" feel.
1 - I've never seen an episode of BGT. Ever. 2 - what is this song? "One of the biggest songs in the world"? I've never heard it. 3 - this performance wasn't all that.