Demi Lovato Tears Up On Stage While Emotionally Reflecting on Six Years of Sobriety -- Watch

'Six years ago, I was drinking vodka out of a Sprite bottle at nine in the morning.'

Demi Lovato is six years stronger.

The Tell Me You Love Me singer teared up on-stage at her New York City show on Friday night, after tourmates DJ Khaled and Kehlani surprised her during her set to wish her a happy six years of sobriety.

"What you've overcome through trials and tribulations, through dark clouds," Khaled told his friend and collaborator. "You found the sunshine, and now the sun is shining on you forever."

"I'm so, so, so, so proud of you, and honored to know you," Kehlani added.

After the two exited, Lovato got emotional while addressing her fans, who had begun chanting her name.

"Kehlani and DJ Khaled, thank you so much," the 25-year-old singer said. "That was so inspirational and so powerful and so meaningful."

Lovato then, through tears, walked fans through her sobriety journey.

"Yesterday, six years ago, I was drinking vodka out of a Sprite bottle at nine in the morning, throwing up in the car," she recalled. "I remember thinking, 'This is no longer cute, this is no longer fun. And I'm just like my dad.' So I took a look at my life, and I said, 'Something has to change. Something has to change, I've gotta get sober' -- so I did."

"The reason I became so open about my story is I know that there are people here tonight that need to ask for help, and I want you to know that it's OK," she continued as the audience cheered. "Mental health is something that we all need to talk about and we need to take the stigma away from it."