“Lighthouse” is a song by Irish boy band Westlife. It is the lead single from their second compilation album, Greatest Hits. The song is their second final physical single after their announcement to disband. The song was written by Gary Barlow and John Shanks, and was released on 11 November 2011. A music video was filmed in South Africa and premiered on 20 October 2011. The song became their second-lowest charting single in Ireland and their lowest-charting single in the United Kingdom, charting at number eleven and thirty-two respectively.