Demi Lovato is a singer.
Demi Lovato . Work on her third studio album , Unbroken ( 2011 ) , began after she successfully completed treatment . `` Skyscraper '' is a song performed by American singer Demi Lovato for her third studio album Unbroken ( 2011 ) . Unbroken is the third studio album by American singer Demi Lovato .