The X Factor Demi Lovato celebrates three years sober, says she wouldn't be alive without boyfriend Wilmer Valderrama 03/16/2015 Demi Lovato is apparently in a great place physically, mentally and emotionally. Read More RELATED NEWS 'The X Factor' alum Jeff Gutt has "zero trepidation" about first tour as Stone Temple Pilots front-manDemi Lovato on her troubled past: "I didn't think I would make it to 21"Demi lovato discusses sobriety and her jealousy of Miley Cyrus TAGS: The X Factor Simon Cowell Demi Lovato Wilmer Valderrama
