For those of you wondering how a legend like Dave Grohl celebrated his 50th birthday...we've got answers! Dave and friends celebrated with 'Grohl Bowl'...a bowling party with guests including Foo Fighter Taylor Hawkins, Sex Pistol Steve Jones, Guns N' Roses bassist Duff McKagan...and even Dave's mom was hanging for a speech in honor of the occasion. Along with Bowling and some obvious adult beverages....Dave also busted out some rhymes with Sir Mix-A-Lot's 'Baby Got Back'....at least a quick excerpt! Check out some Instagram video below and bowl a set to celebrate Dave this weekend!