If the corn dogs, apple pie and animal races during the Napa Town and Country Fair don’t knock you off your tired feet, then watch out when powerful hit-making trio En Vogue take the stage. Fresh from the West Coast of the early 1990s, these divas were “born to sing,” riding the soul train for longer than any other female group in MTV history. And who can forget their timeless collaboration with Salt-n-Pepa, “Whatta Man?” You’ll be “losin’ your mind” when these funky girls take the fair to another level on Thursday, Aug. 9, at the Napa Valley Expo. 575 Third St., Napa. 8pm. $13; 12 and under free. 707.253.4900.