And you can bet there will be celebrities at this year’s derby, too. Simone Biles will tell the jockeys to get ready as the “Riders Up” announcer, and Grace Potter will sing the national anthem. In fact, the three-time Grammy nominee has already been practicing her performance of “The Star-Spangled Banner” quite a bit—even when carpooling.
“When I’m picking up my kid, you can hear me going ‘and the rocket’s red glare’ in the car as I’m coming in,” Grace, who shares 7-year-old…