SIR Mick Jagger caught the deal of a lifetime when he had his aura cleansed on a recent visit to Mexico - for the bargain price of $1.70 (GBP1). The Rolling Stones rocker paid a shaman 20 pesos to undergo the soul purging ceremony that used tree branches, amulets and tobacco smoke to free his body of "bad energy". The budget ritual took place when the 62-year-old and his six-year-old son LUCAS - who was born following his fling with Brazilian model LUCIANA MORAD - visiting the ancient Mexican pyramids of Teotihuacan during a break from the START ME UP hitmaker's high-grossing A BIGGER BANG tour.