Britain's Prince Charles (L) talks to 14 year old go-kart driver Lewis Hamilton, March 31, 1999. REUTERS/Kieran Doherty 

British Formula One driver Lewis Hamilton drives his McLaren during a training session at Catalunya's racetrack in Montmelo, near Barcelona, November 28, 2006. REUTERS/Albert Gea 

Hamilton made a sensational F1 debut with McLaren in 2007, aged 22. In his opening race in Australia he finished third, March 15, 2007. REUTERS/Mark Horsburgh 

British racing legend Jackie Stewart (R) talks to Hamilton during the first day of practice in Melbourne March 16, 2007. REUTERS/Scott Wensley 

Hamilton adjusts his fireproof balaclava as he prepares for the second day practice session in Melbourne March 17, 2007. REUTERS/Scott Wensley 

Third-placed Hamilton celebrates in Melbourne March 18, 2007. REUTERS/Russell Boyce 

Hamilton celebrates his first ever win at the Canadian F1 Grand Prix in Montreal, June 10, 2007. REUTERS/Mathieu Belanger 

Hamilton smiles inside his pit after the first free practice at the Nuerburgring race track July 20, 2007. REUTERS/Kai Pfaffenbach 

McLaren Mercedes Formula One driver Lewis Hamilton from Britain receives medical treatment on a stretcher after he crashed his car during the qualifying session for the European Grand Prix at the Nuerburgring race track, July 21, 2007. REUTERS/Kai Pfaffenbach 

Hamilton celebrates his victory in the Hungarian Grand Prix on the podium at the Hungaroring near Budapest August 5, 2007. REUTERS/Laszlo Balogh 

A practice session for the Chinese F1 Grand Prix in Shanghai October 5, 2007. REUTERS/Claro Cortes IV 

Inspecting the Interlagos racetrack where he had never raced before, in Sao Paulo October 18, 2007. REUTERS/Paulo Whitaker 

Hamilton is congratulated by his father Anthony after winning the Monaco F1 Grand Prix in Monte Carlo May 25, 2008. REUTERS/Stefano Rellandini 

Hamilton and his former girlfriend, singer Nicole Scherzinger, arrive for the birthday dinner party of Nelson Mandela at Hyde Park in London June 25, 2008. REUTERS/Dylan Martinez 

Hamilton enters the pits during the first practice session for the British F1 Grand Prix at Silverstone July 5, 2008. REUTERS/ Eddie Keogh 

He drives past his pit crew after winning the British F1 Grand Prix at the Silverstone race track in central England July 6, 2008. REUTERS/ Eddie Keogh 

After finishing first during the qualifying session for the Chinese F1 Grand Prix at the Shanghai Circuit October 18, 2008.REUTERS/Aly Song 

Hamilton (L) celebrates after winning the Chinese F1 Grand Prix as second-placed Ferrari Formula One driver Felipe Massa of Brazil walks away in Shanghai October 19, 2008. REUTERS/Nir Elias 

in 2008, Hamilton won the title, aged 23 years and 301 days. At the time he was the youngest ever world champion and he took the title on the last lap of the last race in Brazil, November 2, 2008. REUTERS/Bruno Domingos 

Hamilton at the McLaren team headquarters in Woking in southern England November 5, 2008. REUTERS/Toby Melville 

Arriving for the 2008 FIA prize presentation gala with his brother Nick (2nd R), father Anthony (R) and a friend, in Monaco December 12, 2008. REUTERS/Valery Hache/Pool 

Nicole Scherzinger (R) and Hamilton arrive for the world premiere of the film "Jack Reacher" in Leicester Square in central London December 10, 2012. REUTERS/Toby Melville 

Hamilton plays with his pet dog Roscoe in the paddock Formula One racetrack in Monza September 5, 2013.
REUTERS/Stefano Rellandini 

Hamilton reacts on the podium after taking the second place in the Monaco Grand Prix in Monaco May 25, 2014. REUTERS/Max Rossi 

Hanging out ahead of German F1 Grand Prix at the Hockenheim racing circuit, July 19, 2014. REUTERS/Kai Pfaffenbach 

Hamilton gestures to fans as he passes teammate Nico Rosberg of Germany during interviews after a publicity event to unveil watches that they co-designed in Singapore September 17, 2014. REUTERS/Edgar Su 

Rosberg offers a hand to Hamilton before a news conference at the Yas Marina circuit before the start of the Abu Dhabi Grand Prix November 20, 2014. REUTERS/Caren Firouz 

At the Abu Dhabi F1 Grand Prix at the Yas Marina circuit in Abu Dhabi November 23, 2014.
REUTERS/Hamad I Mohammed 

Celebrating with his team after winning the Abu Dhabi F1 Grand Prix at the Yas Marina circuit in Abu Dhabi November 23, 2014. REUTERS/Caren Firouz 

Shares a hug with his then girlfriend Nicole Scherzinger after winning the Abu Dhabi F1 Grand Prix at the Yas Marina circuit, November 23, 2014.
REUTERS/Hamad I Mohammed 

At the Shanghai International Circuit April 9, 2015. REUTERS/Aly Song 

A tattoo with the number of his car, May 20, 2015. REUTERS/Max Rossi 

Russian President Vladimir Putin (R) watches as Hamilton celebrates after winning the Russian F1 Grand Prix in Sochi, Russia, October 11, 2015. REUTERS/Grigory Dukor 

Hamilton clinched his third Formula One world championship after winning the U.S. Grand Prix for Mercedes in Austin, Texas October 25, 2015. . REUTERS/Adrees Latif