Lifestyle Health Celebrity Health Mackenzie Phillips on Demi Lovato: 'People Need to Let Her Do Her Thing and Get Well' Mackenzie Phillips says abstinence is the key to maintaining her sobriety. By People Staff Published on August 1, 2018 09:08AM EDT Comments Mackenzie Phillips says abstinence is the key to maintaining her sobriety. Come back every weekday at 12:00 p.m. EST to watch People Now streaming live from the Meredith offices in New York City. Get the absolute latest in celebrity news, real-life people stories & the best of fashion and food. Want even more? Watch clips from yesterday’s People Now.