Citadel Media syndicated radio host and Grammy nominated R&B singer Brian McKnight, has signed on to perform at September’s NAB Radio Show in Philadelphia. The former Celebrity Apprentice contestant will provide some star power during the NAB Marconi Radio Awards dinner at the radio industry convention September 23-25. McKnight who has quietly become one of the hardest working men in show business, also hosts the morning show at KTWV (The Wave) in Los Angeles and is part of a General Motors campaign using syndicated radio talent to act as spokespersons for GM brands.