@mashable In a hysterical mini-mockumentary from Monday night's show, the host and his former bandmates took a look back at their brief time
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@mashable: The Lost Member of 5 Seconds of Summer https://youtube.com/watch?v=sKv65EBVLLQ …#SavedYouAClickThanks. Twitter will use this to make your timeline better. UndoUndo
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