One day before Donald Trump's inauguration as the 47th president, Green Day delivered a pointed lyrical jab at Elon Musk during their concert.

Green Day changed a stand-out lyric from their 2004 hit "American Idiot" to express their distaste with the tech giant.

"Green day is still trying to relive their good days, they've been irrelevant for decades," another added. Billie Joe changes the lyrics to American Idiot in South Africa to: I’m not a part of ...