[5] Despite being featured in the soundtrack to popular TV series Heartbreak High and its accompanying album, the single did not chart and Mitchell did not release any further solo material.

[6] While still at secondary school Mitchell met the Fonti brothers, Jamie and Sean, who were members of the techno-grunge band, Caligula.

[10][11] The pair did own a studio, when Mitchell sang on "I Love It" Sneaky Sound System had their new vocalist – it became their breakthrough single in July 2006.

[13][14] Aside from providing vocals Mitchell shares song writing credits, generally with McDonald, on much of the group's material including, "Pictures".

[16][17] Mitchell spent a couple of weeks in early 2007 recording vocals for US rapper, Kanye West, in Los Angeles.

[18] She features on four tracks on West's third studio album, Graduation (September 2007), including two singles, "Can't Tell Me Nothing" (May)[19][20] and "Flashing Lights" (November), and the intro song, "Good Morning".

With Sneaky Sound System, Mitchell supported Robbie Williams and Scissor Sisters, and her group played the Australian leg of the worldwide concert Live Earth in July 2007.

[21] Mitchell also recorded vocals on tracks for Snoop Dogg during his extended stay in Sydney for the Good Vibrations Festival.

[21] As of 2009[update], Mitchell is the only singer in Sneaky Sound System after Downey announced he was leaving the band to pursue other interests.