Everyone's already said Imagine which I think has to be the top contender, but I'll add Don't Look Back in Anger on a personal level. Hearing it always puts a pit in my stomach and a black hatred in my heart. In 2017 a muslim suicide bombed an Ariana Grande concert full of little girls in Manchester, from memory killing dozens and injuring over 100. The reaction by the state was to organise an insidious, astroturfed campaign of "togetherness" and "tolerance" called "One Love Manchester" that peaked with a performance of Don't Look Back in Anger. That's the message that the state hands you if you're a native Brit and your own little girls are blown up by the son of two extremist Libyan "refugees" on state benefits, a man who was personally brought to the country by the Royal Navy, who was given the freedom to commit the attack despite appearing suspicious because people were afraid of looking "racist" by profiling him.
Since then I've done my part by not looking back in anger. I'm looking straight forwards.