INDIANAPOLIS (WOWO): This weekend's Indy 500 race is not only bringing out die-hard race fans, but a lot of Indiana celebrities will be in attendance as well. Dallas Mavericks owner and IU grad Mark Cuban and Colts quarterback Andrew Luck will be on flag duty, with Luck delivering the green flag to Cuban who will wave it to kick off the race. Indy 500 icons Jim Nabors and Florence Henderson will both be singing separately during pre-race ceremonies, along with the newly-crowned “The Voice” champion and Indy native Josh Kaufman. Three-time Indy 500 winner, Dario Franchitti, will be driving the pace car.