Watch: Phoebe Bridgers and Clairo join each other onstage during their sets.

At their joint show this evening, Clairo brought out Phoebe Bridgers in Milan, Italy, tonight to sing 'Bags' from Clairo's debut album 'Immunity'. 

The duo last sung together on Lorde's 'Solar Power' album, supplying backing vocals on the track 'Stoned At The Nail Salon'. 

Watch a clip from the performance below...

Later in the show, Clairo returned the favour during Bridgers’ performance, assisting with backing vocals and screams for 'I Know The End'.