Valderrama was seen Wednesday afternoon entering a staff parking lot at Cedars-Sinai Medical Center and ushered in by security.
The former couple dated for six years before pulling the plug in 2016. They first got together shortly after Demi's rehab stint at the age of 18. In 2015, Lovato revealed in an interview with Cosmopolitan that her relapses contributed to their breakups.
As The Blast reported, Lovato was transported to the hospital on Tuesday for a medical emergency. We've since learned that a nurse at the hospital told police she was doing a type of methamphetamine prior to her overdose.
Days before her hospitalization, the singer forgot the lyrics to "Sober," the song she wrote about her struggles with addiction.