The following year, they released their debut album, "The Secret Life of..." (2005), which spawned their first major hit, "4ever", peaking at number two on the ARIA Singles Chart and being certified platinum, denoting 70,000 copies shipped in Australia. The album sold almost half a million copies worldwide and earned them an ARIA Award for Best Pop Release. In 2007 they released their second album "Hook Me Up" and its eponymous single scored them their first number one hit on the ARIA Charts and was certified platinum. The following single, "Untouched" became their global breakthrough song, reaching the top twenty of the "Billboard" Hot 100 charts, and the top twenty in seven other countries, including number one in Ireland. It went on to be certified platinum in the United States, with over one million digital downloads. They embarked on the Revenge Is Sweeter tour, their first to go global, which began in February 2009 and ended December.