OOOH! I know who one of them is! She was on Doctor Who! She's in the episode about the She's a musician from the 80's. I think she posed for Playboy a few years ago. Kylie Minogue! Thank you wikipedia! I have no idea who the other is as she's not been on Doctor Who yet.
this is the effect you get when "good" singing becomes so completely ossified and reproducible that a total amateur of questionable intent is more interesting
The show doesn't work without him. No one gives a flying fuck about the actual "talent", they just want to see him go bug-eyed, tell people they are shit and argue with Louis Walsh.