at the 2006 Commonwealth Games, where she missed making the final, and in the 4 x 400 metres relay event, where she won her third successive gold medal amidst a major controversy, as part of the victorious Australian quartet. In 2007 Lewis made a return to the 800 metres under new coach, and brother, Justin Lewis, winning the national championships, placing in several European Meetings and qualifying for the 2007 World Championships, where she finished fourth in her heat in 2:01.21 and again missed the final. Lewis enjoyed a return to her best form in early 2008, remaining undefeated over 400 metres and 800 metres in Australia. She ran a personal best time of 51.44 to win the national 400 metres titles and comfortably retained her 800 metres crown. These performances earned Lewis selection in her third consecutive Australian Olympic team. At the 2008 World Indoor Championships, held in Valencia, Spain, Lewis qualified for the final by running an Australian record of 2:01.85 in her heat. In a tactical final, Lewis broke away from perennial champion Maria de Lurdes Mutola and Ukrainian Tetiana Petlyuk to win the gold medal in a major upset. Lewis said "I was wondering what I was doing out there. Then I realised that I could win the race. This is amazing. I still can't believe it." Lewis represented Australia at the 2008 Olympics in Beijing. Here she made the semi-final of the 800 metres and narrowly missed qualifying for the semi-final of the 400 metres. At the 2009 Australian Championships, Lewis won both the 400 metres and the 400m hurdles. Over her athletics career, Lewis won a total of 18 national titles, and her coaches included Peter Fortune (Cathy Freeman's coach), Sebastian Coe and Daley Thompson. Relay teams Lewis won a number of international medals in the 4 × 400 m relay: At the 1996 World Junior Championships in Sydney, Lewis, Rosemary Hayward, Josephine Fowley and Jennifer Marshall won a bronze medal, recording a time of 3:32.47. At the 1999 World Indoor Championships in Maebashi, Lewis combined with Susan Andrews, Tania Van-Heer and Cathy Freeman to win a silver medal in an Australian record of 3:26.87. Lewis is also a three-time gold medal winner in the Commonwealth Games 4 × 400 m relay event. At Kuala Lumpur 1998, Lewis joined Lee Naylor, Tania Van-Heer and Susan Andrews to win in a time of 3:27.28. At