You can't be an attractive girl on these shows and expect to win as it's mainly women that watch, the only ways an attractive girl can win is to rely on an attractive guy to get them votes like how Jess had to rely on Matt in TXFAUS to get them through (although tbf he also had an incredible voice) also other venues for attractive girls is to play your looks down like Louisa on this years X Factor, or have an Anton figure by your side who a lot of people find funny.
Name me a year of a Reality TV Show where the attractive girl didn't have to do any of the above just to get votes and I'll eat a packet of Crisps.