Demi Lovato

The ‘Sorry Not Sorry’ singer has been open about her history with addiction and confessed to taking a particularly powerful drug when she was publicly promoting sobriety.

She said in her documentary ‘Simply Complicated’: "I wasn't ready to get sober. I was sneaking (it) on planes, I was sneaking it in bathrooms, sneaking it throughout the night... I went on a bender of like, two months, where I was using it daily."