The three titles this season come hot on the heels of his success in last year 's inaugural MSA Formula Championship .
He signed off from his title - packed karting career in 2014 , as the youngest ever World Championship winner -- taking the accolade off Lewis Hamilton .
The three titles this season come hot on the heels of his success in last year 's inaugural MSA Formula Championship and he signed off from his title - packed karting career in 2014 , as the youngest ever World Championship winner -- taking the accolade off Lewis Hamilton .