Celebrating life's milestones with friends is all you want to do, but when fancy promotions and birthday hooplas get too pricey for Phoebe, Joey and Rachel - who's just a waitress - Ross, Monica and Chandler go to the Hootie & the Blowfish concert without them. Oh, and Chandler pretends to be Bob in order to land the mystery woman who keeps calling his phone looking for Bob!