olly is the best performer and also has a pretty great voice too ( not as big as joe's and staceys of course but its not just about singing im afraid )
joe has good stage presence and the best voice probably
danyl has good stage presence, most of the time but he cant sing, he shouts/sounds nasally
stacey looks really uncomfortable but good voice

id say olly was worse singing wise that stacey and joe but danyl.. how can anyone listen to him and say.. "Yeah he can sing great!"
hes blatantly out of tune every week and gets told he's amazing, it baffles me
Denise vanouten has confirmed this fact

I will admit he is way overrated by the judges,
they praise him OTT, but he can sing (they praise Olly OTT too, espicially the weeks he was really quite poor and they were going amazing, when fans said he was not that good that week - hence being bottom 2).
But its clear they want a male winner this year, asthey get the better comments - last week they gave no real useful comments to Stacey. Cheryl 'last girl represent', wow good comments Cheryl, we know shes the last girl. Louis, 'you should make the final', doesnt really help her improve or what not, would love her to win but talk about her and her preformances more.