Nelson Ã ngelo Tamsma Piquet Souto Maior ( born 25 July 1985 in Heidelberg , West Germany ) , also known as Nelson Piquet Junior or Nelsinho Piquet , is a racing driver . Nelson Ã ngelo Tamsma Piquet Souto Maior ( born July 25 , 1985 in Heidelberg , West Germany ) , also known as Nelson Piquet Junior or Nelsinho Piquet , is a Brazillian stock car racing driver and former Formula 1 driver .