Demi Lovato is an American singer, songwriter, and actress. She is best known for her hit singles such as 'Sorry Not Sorry' and 'Cool for the Summer'. She has also starred in films such as Camp Rock and Sonny with a Chance. She is also well known for her role as a judge on the singing competition show The X Factor. Demi Lovato is also a skyskraper singer, having released the single 'SKYSCRAPER' in 2011.