Last night (Oct. 18) at the first of two New York shows on her Holy Fvck tour, Demi Lovato brought up the Goo Goo Dolls singer John Rzeznik to perform his band's 1997 smash hit "Iris." This year, "Iris" surpassed 1 billion streams on Spotify and has previously been covered by numerous artists, including Taylor Swift, Phoebe Bridgers, Maggie Rogers, and Snail Mail. The song has been rediscovered by younger generations online and as a result reached seven-times platinum status and even re-entered multiple Billboard charts for the first time in years. Goo Goo Dolls are currently on a fall tour in support of their 14th studio album, Chaos in Bloom. Lovato, SPIN's September cover star, has nine shows left on their current tour, which concludes Nov. 6 in Irving, Texas.