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Guitarist plays Green Day classic at Liverpool's Cavern Club – only to discover Billie Joe Armstrong was filming his set
Resident performer Callum McMorran thought it was just another Tuesday – turns out Billie Joe Armstrong had been watching his performance ...
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Amateur musician unknowingly performs Green Day classic in front of Billie Joe Armstrong
Billie Joe Armstrong was visiting some of Liverpool's iconic music locations, and happened upon a local musician playing one ...