This summer the proud nation known as the United States Of America will officially celebrate its 250th birthday. Donald Trump is doing his very best to turn this into a celebration of his own magnificence, and the proceedings will include a UFC event on the White House lawn and a grand prix race in Washington, DC, a city not exactly built for automotive speed. The Freedom 250 people have also put together the Great American State Fair, a series of concerts on the National Mall that will attempt to make America 1990 again. Freedom 250 just announced the lineup of performers that'll play the Great American State Fair this summer. It's a dream bill of cheesy pop hitmakers from the era of the first Gulf War, including known Trump ally Vanilla Ice, as well as Milli Vanilli, C+C Music Factory, Young MC, and Poison frontman Bret Michaels. Given that Milli Vanilli and C+C Music Factory are both duos with one surviving member apiece, it's hard to imagine what these performances will even be.…