Lorde has made another surprise appearance at a concert - this time, joining Australian electronic producer Flume on stage.
Flume was performing at FYF Fest in Los Angeles when the Kiwi singer made an onstage appearance during his remix of her song Tennis Court.
In July, Lorde surprised fans when she appeared onstage at Taylor Swift's 1989 concert in Washington D.C.
Lorde - real name Ella Yelich-O'Connor - is currently working on her second album, which she recently described as being "exciting and scary" and influenced by Swedish electro-pop singer Robyn.
She also has a song appearing on Disclosure's upcoming album.
