"This Is Who I Am" is the first single from Vanessa Amorosi's album Hazardous. The song, "This Is Who I Am", made its radio debut on the Kyle & Jackie O show on 28 August 2009 on the Fox FM radio station in Melbourne. The single was released in Australia on 9 October 2009.
The single has debuted at number one on the Australian Singles Chart on 18 October 2009. Amorosi said: "I am completely overwhelmed when I heard ‘This Is Who I Am’ came in at number one. I am so excited and thrilled to have the support from both the media and my fans. It is my first number one single and I will absolutely treasure this moment."
In its second week on #1 in the ARIA charts the song achieved Gold status in Australia and has been certified Platinum in its 8th week of release.
The iTunes digital EP includes an additional remix; "This Is Who I Am" (Macho Psycho Massive Strings Remix). Another remix, titled "This Is Who I Am" (Macho Psycho Euro Tech Remix), is available at Last.fm.