Sergio "El Shaka" Vega, a Mexican musician famous for his songs about drug barons, was murdered Saturday night while driving in his red Cadillac to a concert in Sinaloa state in northwest Mexico. Only hours before the attack, the 40-year-old Mexican singer had publicly denied rumors that he had been murdered, reports the BBC. "It's happened to me for years now, someone tells a radio station or a newspaper I've been killed, or suffered an accident," Mr Vega told entertainment website La Oreja according to the BBC. ...the musician was gunned down by unknown men who were following him while...