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5: Bastille

Bastille emerged on the mainstream scene in 2012 with their album ‘All This Bad Blood’ and despite seemingly disappearing for a little while, returned just as strong with their single ‘Good Grief’ which has a current peak of 13th on the official charts. With them selling over 5 million albums to date and their follow-up expected to have similar success, you wouldn’t bet against them headlining soon.