Life Demi Lovato is 90 days sober, her mother reveals: ‘I couldn’t be more thankful’ October 28, 2018 Cydney Henderson, USA TODAY Comments Off on Demi Lovato is 90 days sober, her mother reveals: ‘I couldn’t be more thankful’ Demi Lovato's mom, Dianna De La Garza, appeared on Maria Menounos‘ Sirius XM podcast and revealed that the 'Skyscraper' singer is 90 days sober.