'Cherokee' singer says the tour is on but it will be stripped back
Singer says she got sick the day after 'Sun' came out and has 'been struggling to keep in equilibrium'
The single comes from the singer's new album 'Sun'
Chan Marshall visit London's Roundhouse as part of a full European tour
The singer songwriter's ninth album is set for release on September 10
The follow up to 2008's 'Jukebox' is set for a UK release on September 10
The follow-up to 2008 covers album 'Jukebox' will be out September 10
Singer previews new album with charity single