FLINTSTONE, Md. (WBFF) - There's about to be a big '90s throwback in western Maryland! Vanilla Ice and Coolio will be performing July 20 at Rocky Gap Casino Resort in Flintstone, Allegany County. The resort complex announced that "one of the most iconic duos of the 90s" will take over the Ampitheater stage starting at 5 p. m. It's part of Rocky Gap's summer concert series. The show is exclusively for guests 21 and older.