Demi Lovato on Selena Gomez’s Kidney Transplant: ‘She Is a Very Strong Woman’

Demi Lovato couldn’t be more proud of friend Selena Gomez for soldiering through her kidney transplant.

“I think that she is a very strong woman,” Lovato told PEOPLE exclusively Friday evening following a private performance in downtown Los Angeles for her Spotify superfans to celebrate the launch of her upcoming album, Tell Me You Love Me.