The show returns for its fourth season on Sunday, with new judges Una Foden and Rachel Stevens joining Kian Egan and Bressie on the panel. These two ladies will replace Jamelia and Dolores O'Riordan, who left the show last year. Things will kick off tonight with the blind auditions, where the judges must listen to the act without seeing who's singing... sure you know how it goes by now. Katherine Thomas will be back on presenting duties and we assume Eoghan McDermott will be floating around somewhere too.