Taylor Swift wowed the O2 Arena audience after making a surprise guest appearance during Haim's Thursday night London show.
Fans screamed as the 32-year old joined the three-sister girl band on stage on the final UK stopping point of their ongoing One More Haim tour.
The group were clearly delighted too as Este, 35, Danielle, 32, and Alana, 29 all applauded and bowed to the superstar as she strutted towards the centre of the stage.