Cheryl Cole keeps out the chill in a furry bobble hat - but the heat is on for frightened Cher who fears her dream is over

http://www.youtube.com/watch?v=Q03rYTe5pgoendofvid[starttext]By JODY THOMPSON Cosy: Cheryl Cole looked snug in her outsize bobble hat as she arrives at the X Factor studios for rehearsals todayCheryl can't save Cher this week as judges lose power in semi-final over who stays or goesThe 17-year-old must rely on public to put her through to finalShe's going into the X Factor semi-final in the