Iggy Azalea's pop collaborators Charli XCX and Rita Ora have teamed up for their own duet after previously scoring chart hits with the Australian hip-hop star. The pair has joined forces for a new version of Fancy star Charli Xcx's Doing It, which originally appeared as a solo track on her debut album, Sucker. Ora, who worked with Azalea on Black Widow, takes over vocals for the second verse of the song.