Demi Lovato released her fifth and sixth studio album in 2015 and 2017 .
After co-founding Safehouse Records , Lovato released her fifth and sixth studio albums , Confident ( 2015 ) and Tell Me You Love Me ( 2017 ) , both of which dealt lyrically with more mature themes with the lead single from the latter , `` Sorry Not Sorry '' , becoming Lovato 's most commercially successful single in the United States to date .
Demi Lovato