Ariana Grande brought Cynthia Erivo onstage for a surprise performance at the O2 Arena in London on Sunday, Aug. 16 [1].

The reunion marks a high-profile collaboration between the two "Wicked" co-stars during the London leg of Grande's Eternal Sunshine world tour.

Grande and Erivo performed two songs together during the event [2]. The pair delivered renditions of "Happy Days" and "For Good" for the crowd [3]. The performance occurred during Grande's second show in the city [3].

The appearance served as a surprise for attendees at the venue. While the two artists have worked together on the film adaptation of "Wicked," this live concert pairing highlighted their vocal chemistry outside of a cinematic context [1].

The O2 Arena is one of the largest indoor venues in the United Kingdom. The surprise duet occurred as part of a broader tour schedule supporting Grande's latest musical project [2].

Neither artist provided a formal statement regarding the collaboration immediately following the show. However, the event drew significant attention from fans of both the singer and the upcoming film [1].

Grande brought Erivo onstage to perform the songs “Happy Days” and “For Good”

This performance leverages the cross-promotional synergy between Grande's solo music career and the theatrical release of "Wicked." By integrating Erivo into her tour, Grande bridges the gap between her pop audience and the musical theater world, strengthening the public association between the two leads before the film's broader impact.