The Irish boy-band are comprised of Nicky Byrne, Kian Egan, Mark Feehily and Shane Filan. They are the only band in British history whose first seven singles have gone straight to Number 1.
The band will do a one off special
Find out which tracks made it onto their upcoming 'Greatest Hits' album.
Find out which song the boys from Ireland chose over one of their own songs.
X-Factor finalist Mary Byrne also sings for the Queen during her state visit to Ireland.
Westlife perform in Beijing, Shanghai and Hong Kong on their recent tour of Asia.
See the boys performing as their Gravity tour arrives at the LG Arena, Birmingham.
Read why the band are going their separate ways and enjoy some memories.
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On TV: 70 Should've Been Number 1s!
12:30pm - 6pm
Now playing: Non-stop hit music