A surprise party, new car parked in the driveway or even a box of Sprinkles cupcakes — all these pale in comparison to receiving an actual Flash Mob for your birthday. That’s exactly what Betty White was treated to by her Hot in Cleveland cast and crew as she drove to the set yesterday, and not just any Flash Mob, but a Hula-themed one.  All of this was to celebrate White’s birthday. She turns 93 today. Happy Birthday, Betty!