A cool video has emerged of Foo Fighters frontman Dave Grohl inviting a thrilled fan onstage for a beer on his 50th birthday.<br /><br />The footage, captured by an audience member at the band's concert in Detroit, MI, USA on Monday, shows Grohl inviting the man onto the stage after spotting him holding up a sign reading 'It's my 50th, let's have a beer!'<br /><br />The two can be seen drinking together before Grohl jokingly dismisses him telling him to "get the f*** off the stage".
