Just got this from Digital spy..
I just watched last night's Xtra Factor and they showed a judges houses clip of 3 of the boys and Holly jumping a pool with Cheryl watching.
I'm guessing they are the final ones she chose since there's only three of them and they appear to be celebrating.
Again I’m just guessing but the 3 guys 'celebrating' by jumping in a pool while Cheryl watches was just too obvious.
The Boys are
Lloyd, Rikki and Jjoseph
basically Confirmed anyway because of spoilers.. but I think these 3 are 100 Percent through