Guy Theodore Sebastian (born 26 October 1981) is an Australian pop, R&B, and soul singer-songwriter who was the first winner of Australian Idol in 2003. In 2010 he was selected to be a judge on the Australian series of The X-Factor. He has released six top 10 albums, five of which have reached the top 4 of the ARIA Album Chart, including a No.1 and 2. They have all achieved either platinum or multi platinum accreditation. He has also released ten top 15 singles, seven of which reached the top 10 of the ARIA Singles Chart, including five No. 1's. Sebastian is the only Australian male artist in Australian music history to achieve five No. 1 singles, and is equal third overall for all Australian acts. With 25 platinum and 2 gold accreditations and over 1.9 million CD sales in Australia, he has the highest accreditations and sales of any Australian Idol contestant. Sebastian has also reached the top ten on the New Zealand Charts with an album and four singles including two No. 1's, and has four platinum and one gold accreditation there..