St. Vincent and Beck joined Taylor Swift on stage in California last night (25 August) to perform 'Dreams'. Watch footage below.
Swift has been inviting various fellow musicians onstage with her over the course of her 1989 world tour - including Haim, Lorde, Mary J Blige and Joan Baez - as well as a whole host of non-musicians - from Julia Roberts to Matt LeBlanc.
Last night though, arguably the greatest moment of the tour arrived in the form of St. Vincent and Beck. St. Vincent stepped on stage shredding on the guitar as pyrotechnics exploded behind her - and it only got better from there.
Swift later described the performance as "something I'll remember forever. I can't even express it."
Watch Taylor Swift, Beck & St. Vincent perform 'Dreams' at Staples Center below
Had the most MAGIC time with the most brilliant and venerable @taylorswift13 & @beck tonight. #DreamComeTrue
— St. Vincent (@st_vincent) August 26, 2015
'Dreams' was released back in June, and is the first single to be taken from Beck's not-yet-announced upcoming album.
Meanwhile St. Vincent, who is fresh from headlining Green Man Festival, released her self-titled fourth album last year, when it was named Gigwise's album of 2014.