Demi Lovato has an unbelievable voice. This is not news, girl can flat out sing. She displayed those impeccable vocals when she stopped by the BBC Radio 1 Live Lounge for a fantastic set. Demi covered Sam Smith’s ‘Too Good at Goodbyes’ and you have to check it out in the video above! Sam heard her performance and shouted her out on Twitter…Demi also performed two more singles, ‘Skyscraper’ and her latest (double platinum single) ‘Sorry, Not Sorry’.