"Tonight"/"Miss You Nights" is the second and last single released from Westlife's greatest hits album, 'Unbreakable'. It was released as a double A-Side in the UK, but in some other countries, both songs were released separately. "Tonight" was written by Steve Mac, Wayne Hector and Jorgen Elofsson. "Miss You Nights" is a song written by Dave Townsend and originally recorded by Cliff Richard in 1975. At the time, it had reached #15 in the UK Singles Chart. The Westlife single peaked at #3 on the UK Singles Chart, becoming the band's second non-chart topper. It sold over 115 000 in UK so far.