Demi Lovato says she is now a new person in her first public appearance after sharing her relapse in the track "Sober."

The 25-year-old performed at a concert in Lisbon, Portugal on Sunday, June 24.

Demi Lovato Performs 'Sober'

At the Rock in Rio Lisbon music festival, the singer took the stage and performed a stripped down version of her new single where she apologizes to her loved ones for once again falling off the wagon. Lovato, who has been in rehab for her substance and alcohol abuse, admitted in the song that her six years of sobriety has ended.

According to Billboard, the performance has to be one of her most emotional, most personal appearance onstage yet. At one point, she was so overwhelmed with emotions that her voice started cracking. It was especially tough for her to sing the part where she addressed fans and admitted that she failed to become a role model.

However, despite her flaws and faults, her fans remain by her side.

Demi Lovato's Emotional Song Tops Charts

The track has only been released this weekend, but Lovato's honesty and courage to talk about her relapse made "Sober" a global hit. Express UK reports that the track has already launched into the top of the U.S. and U.K. iTunes singles chart. "Sober" also debuted at the No. 1 spot on iTunes charts in Argentina, Brazil, Colombia, Cyprus, Ecuador, Greece, Guatemala, Hungary, Netherlands, Peru, and Saudi Arabia. This week, the former Camp Rock star also scored her first U.K. chart-topper with "Solo," her collaboration with Clean Bandit. The dance bop currently sits on top of the U.K. singles chart, beating George Ezra's "Shotgun" and Anne-Marie's "2002," which sits on No. 2 and No. 3, respectively. Jess Glynne's "I'll Be There" and Ariana Grande's "No Tears Left To Cry" make up the Top 5.