Demi Lovato is officially three years sober, and she’s celebrating by thanking her friends, family and fans for helping her reach her “3rd birthday. While she turned to Twitter to thank everyone who has been part of her life and journey to sobriety, she called out one special man in particular who has been a critical factor in her success: boyfriend Wilmer Valderrama. The “Really Don’t Care” singer posted an adorable photo of Wilmer kissing her on Instagram and penned an emotional caption to express her love and gratitude for him. Ahead of the 2014 MTV Music Awards, Lovato posted a picture of her previous looks how talked about how she felt “ugly” in them.