What did Una Healy do before Saturdays?

Before joining the girl group Saturdays, Una Healy was a member of the Irish pop group Tiara, which was formed in 2000. The group released two studio albums before disbanding in 2003. Healy then went on to pursue a solo career, releasing her debut album, "Unwritten," in 2004. She later joined Saturdays in 2007 and remained with the group until their hiatus in 2014.