"RIP Naya Rivera. I’ll forever cherish the opportunity to play your girlfriend on Glee," Lovato wrote, alongside a slideshow of photos from their time together on the Fox dramedy. "The character you played was groundbreaking for tons of closeted queer girls (like me at the time) and open queer girls, and your ambition and accomplishments were inspiring to Latina women all over the world."
Lovato was a recurring guest star during the fifth season of Glee, in which she played Dani, who has a short-lived romantic relationship with Rivera's Santana Lopez.
"My heart goes out to your loved ones at this time.. ❤️" Lovato concluded.
She was reported missing last Wednesday after she took a boat ride with her 4-year-old son, Josey, in Lake Piru in the Los Padres National Forest in Ventura County, California.
Following her disappearance and death, friends, family and former co-stars have been paying tribute with heartfelt memorials, remembering Rivera's life and legacy. See the video below for more on the outpouring of condolences.