We've got a fun clip from DreamWorks' Trolls: The Beat Goes On to start your Friday the right way today. Get ready to sing along as the title characters lead audiences in a brand new song for Season 6. This season, the trolls will take their super-fun parties up to a whole new level as they prepare for a formal gathering that happens only every once in a while. That's right, it's time for: The Hair Ball! And as our exclusive new clip shows, it's kind of a big deal. Featuring the voice work of …