The music video for Pharrell Williams’ ‘Happy’ from the Despicable Me 2 soundtrack featured actors from the film, and the song went on to became the best selling single of 2014. And just last summer Wiz Khalifa’s ‘See You Again’, which plays over the closing scenes of Furious 7, was one of the year’s biggest number ones on both sides of the Atlantic. Of course, releasing a tie-in single is no indication of quality, but in era where both film and music seem more disposable than ever before, the revival of this trend is for now a (mostly) welcome one.

http://lwlies.com/articles/the-fall-and-rise-of-movie-tie-singles/