Demi Lovato at the BBC Radio 1 Studios in London, September 2015

Demi Lovato at the BBC Radio 1 Studios in London, September 2015-1

Demi Lovato at the BBC Radio 1 Studios in London, September 2015

Demi Lovato at the BBC Radio 1 Studios in London, September 2015-2

Demi Lovato at the BBC Radio 1 Studios in London, September 2015-3

Demi Lovato at the BBC Radio 1 Studios in London, September 2015-4

Demi Lovato at the BBC Radio 1 Studios in London, September 2015-5