The X Factor is a book .
This series proved to be highly controversial , with many people complaining about the use of pitch correction software on the broadcast of contestants ' auditions , the decision to form two groups out of rejected soloists , the rejection of popular contestant Gamu Nhengu at judges ' houses and Cole 's failure to vote to eliminate an act in week 5 of the live shows .
The X Factor -LRB-UK series 7-RRB-