One of Delaware’s brightest stars will return home for Dover Motor Speedway’s biggest NASCAR weekend ever. Multi-platinum selling, award-winning country music superstar and Milton native Jimmie Allen will perform a pre-race concert at the Monster Mile on Sunday, May 1.  The 12:45 p.m. concert at the Embrace Home Loans Stage in Victory Plaza will immediately precede the DuraMAX Drydene 400 …