1. They can convince the world that bluegrass is the best colour for grass View this video on YouTube Thanks to The Soggy Bottom Boys and O Brother Where Art Thou (2000) 2. And celebrate blues and Motown… while also making everyone in Calumet City shake a tail feather View this video on YouTube Who knew everyone outside Ray's Music Exchange in The Blues Brothers (1980) could dance so well and in time? 3. But also reflect on — and signal the end of — the Summer of Love… View this video on YouTube As in the terrific Easy Rider (1969) 4. While they make you think that ‘70s rock bands weren’t all that bad… View this video on YouTube Cheers, Richard Linklater's depiction of 1976 in Dazed & Confused (1993) 5. And make you want to sing “hold me closer, Tony Daaaaaaanza” with your friends… View this video on YouTube When reenacting Cameron Crowe's famous scene of 1973-esque band camaraderie in Almost Famous (2000) you could sing the *real* words . But where's the fun in that? 6. While getting funky… View this video on YouTube When settling in to Issac Hayes and Shaft (1971) 7. And showing how the ‘70s and ‘80s were alternately hedonistic and depressed View this video on YouTube As in Michael Winterbottom's tribute to/biopic of Manchester impresario Tony Wilson, 24 Hour Party People (2002). 8. How about saying ‘screw you’ to the man by dancing? View this video on YouTube Take THAT, the man. Footloose (1984). 9. Or soundtracking your '80s teen romance and karate tournament montage… View this video on YouTube Turns out Daniel Laruso WAS the best around. The Karate Kid (1984) 10. Or by telling a completely bonkers love story… View this video on YouTube Good job, Prince. Purple Rain (1984) 11. And it turns out anything John Cusack was in during the ‘80s has a soundtrack to die for View this video on YouTube Geddit? Better Off Dead (1985)... Ahem. 12. And they also soundtrack your next beach volley ball game….… View this video on YouTube Even if it doesn't explain all the flexing. Top Gun (1987) 13. No… really. Era defining music and John Cusack movies go hand in hand…. View this video on YouTube Thanks, Say Anything (1989) and Peter Gabriel. 14. And sometimes they define an era by straight out recreating a decade… View this video on YouTube Though Adam Sandler's originals weren't too far off the mark in The Wedding Singer (1998). 15. But then they can also sum up years of latent anger and oppression… View this video on YouTube As in Spike Lee's Do The Right Thing (1989). 16. They can also remind you of when everyone wore flannel and listened to grunge View this video on YouTube Thanks a lot, Singles (1992). 17. And prove that ‘90s rap-metal mash ups don’t necessarily suck View this video on YouTube Well. Some of them. Like Judgement Night (1993). 18. And they make you want to dance in convenience stores and have intense conversations with, like, everyone View this video on YouTube Gen X - ruined by Reality Bites (1994) 19. While proving that white boy dreadlocks have always been dubious View this video on YouTube youtube.com We *had* to go for seconds here for Reality Bites (1994) 20. Plus, they can remind you just how ridiculously great UK music could be in the mid-‘90s… View this video on YouTube And how terrible the pub toilets are in Scotland. Trainspotting (1996) 21. Better still, they can soundtrack every teen party for a decade or so… View this video on YouTube Good job, American Pie (1999) 22. And allow a beanie-d and bearded British bloke to kick off the post-Britpop ‘00s View this video on YouTube While delivering a terrific adaptation of a beloved book, as with About A Boy (2002). 23. While perfectly setting up the showcasing of tidy ‘00s indie music View this video on YouTube Natalie Portman DID say it'd change your life in Garden State (2004). 24. And signposting hip-hop's take over of the mainstream View this video on YouTube It was all up and up after Dave Chappelle's Block Party (2005). 25. As well as EDM's View this video on YouTube Daft Punk were (easily) the best part of Tron: Legacy (2010). Two and half years later, 'Get Lucky' would take over the world. 26. ... and the cool part is that they can still scare old people View this video on YouTube While toting bikinis and corn rows, hey Spring Breakers (2013)? 27. And make you realise that organising your life via music isn’t a bad thing at all... View this video on YouTube Complete with Top 5s across all eras and all genres. Thanks, High Fidelity (2000).