Drastic Fantastic is the second studio album by Scottish singer-songwriter KT Tunstall. It features some unreleased tracks she wrote before Eye to the Telescope such as new tracks she wrote in 2003. The record was released by Relentless Records on 10 September 2007 in the United Kingdom and elsewhere in Europe, on 15 September in Australia, and 18 September 2007 in the United States and Canada. However, the album was leaked on P2P networks on 3 September 2007.

Some additional tracks features other unreleased songs such as "Mothgirl", "Bad Day" and "Journey", and during the Drastic Fantastic Tour, Tunstall covered "La Vie En Rose", which is on the U.K Bonus tracks, "My Sharona", The Bangles' "Walk Like an Egyptian" and Chaka Khan's "Ain't Nobody" which features on the DVD. Also, three singles were taken from Drastic Fantastic: "Hold On", the lead single, "Saving My Face" and "If Only", which all charted in the UK Top 100.

On the US Billboard 200 chart, Drastic Fantastic debuted at number nine, selling about 50,000 copies in its first week, and sold around 225,000 copies in 2007.

The album was reissued on 15 January 2021 in vinyl, triple-disc, and digital formats as Drastic Fantastic: Ultimate Edition, consisting of previously unreleased songs and remixes.