She can be abit much and please oh please can she stop dueting with contestants are trying to overshadow them, yes we get it she can sing! But Jahmene, James, Sam and now Matt (the latter 2 especially) were considerably disadvantaged. In the James v Jahemne season she was both their celebrity duet! Seriously, that's SO boring. Can we can now summon up any star power at all..
My preference still stands:
Saara and Robbie 'angels'
Matt and Sam Smith 'writing'
5AM and Spice Girls 'Spice Up ur life'
But yes all those artists said no, but it would have been fab. I don't understand why the show doesn't have star pulling power anymore. Maybe they need to make the acts who come on to promote their songs sign agreements! in trade for dueting.