Twenty Ten is a two-disc retrospective album by Australian singer and songwriter Guy Sebastian. Disc one contains 18 songs from his previous five albums and two new songs, including the lead single "Who's That Girl" which features American rapper Eve. Disc two has acoustic versions of ten of the songs. The album was released in Australia on 19 November 2010 and reached number four on the ARIA Album Chart, Sebastian's sixth consecutive top ten album. It was certified platinum in its fourth week of release and was the fifth highest selling Australian artist album of 2010. It reached 2× platinum certification in 2014. "Who's That Girl" reached number one on the ARIA Singles Chart and achieved 5× platinum certification, and was Sebastian's fifth of six number one singles in Australia. It won the Highest Selling Single ARIA Award in 2011, and received nominations for Single of the Year and Best Pop Release. Sebastian was also nominated as Most Popular Australian Artist. "Who's That Girl" also reached number one and Platinum certification in New Zealand. Background While Sebastian's recording career has been relatively short, prior to this album he had released five top ten albums which produced ten top fifty singles. Nine of these singles peaked inside the top 15 of the ARIA singles charts, with six reaching the top ten including four number ones. The earliest indication that he would be releasing a retrospective album came in October 2010 when it was revealed he had recorded a new single titled "Who's That Girl". The artwork of the album was revealed shortly after, along with the official track listing. Sebastian said in an interview with the Daily Telegraph, "It's weird to have a best of, I've only been doing this for seven or eight years. I guess it's one of those things, the record company contract finishes and they've got that in their artillery." In the EPK for the release Sebastian said, "We put together more of a compilation that was packaged in a way that was different. I put 20 of the songs on and then got ten of them and did totally different versions. It gives the fans something else, and takes them back too through that journey" As Sebastian has recorded songs in a variety of genres on his five previous albums, the songs on Twenty Ten range from pop, pop rock, funk, R&B, jazz, gospel through to