This song is by Westlife (Facebook link), a group that has been in the charts since 1998. It is from their final album “Greatest Hits” . The Irish group has said they will be splitting up after their final 2012 tour.
The album contains some older songs and four new ones including this one called “Lighthouse”. It is the band’s second compilation of greatest hits, following the 2002 release of “Unbreakable.”