Janet Devlin (16) from Omagh, Co Tyrone, is the bookies' favourite and wowed the judges with her version of Elton John's Your Song.
Melanie McCabe (18) from Whitehall in Dublin is the talented comeback kid who first entered when she was 14 but was told to return when she was a bit older.
Laura O'Neill (22) from Dublin is a teacher at the National Performing Arts School and sings with the band The Firm.
Michelle Barrett (32) from Co Kildare moved judge Tulisa to tears by reminding her of her mum. Michelle has four children and wants to make it to the top of the charts.
Megan Burke (19) from Dublin impressed the judges with her audition in Cardiff and she sang two songs for them. She was previously on RTE show Class Act.