Lovato has previously been open about her own battles with an eating disorder.
The chart-topping pop star began her career on the small screen, first finding fame alongside the Jonas Brothers in TV movie Camp Rock.
The 28-year-old had a recurring role in Glee and appeared in the final season of Will & Grace.
Lovato, who performed during the celebrations for Joe Biden’s inauguration earlier this month, will revisit her 2018 near-fatal drug overdose in an upcoming YouTube series.
She said she will relive “the darkest point in my life” in Demi Lovato: Dancing With The Devil, set for release in March.