Read more: Westlife's Mark Feehily 'devastated' to ... it's high school or relationships - and means so much to them. "Swear It Again - our first song in 1999 - was a number one selling record ...
They sat with Filan at the front of the stage, performing acoustic versions of Westlife's Swear it Again and Amazed, as well as two of Filan's original songs, Baby Let's Dance and Once.