The 1970s was a rich time for pop songs. It was dominated by Abba whose dress sense sometimes posed an obstacle for image-conscious music fans but whose music proved to be the real thing. Blondie brought some New York punk energy to a clutch of catchy numbers, Dylan gave us his anthemic ‘Knockin’ On Heaven’s Door’, Lennon released his even more anthemic ‘Imagine’, new kid Elvis Costello arrived with ‘Oliver’s Army’ while Carly Simon had a hit with her seductively cagey ‘You’re So Vain’. Here are 26 hits from the decade.