Article continues below advertisementThe battle of the pop stars continues.Charli XCX seemed to further fuel her alleged feud with Taylor Swift in a Tuesday, October 14, interview, where she gave her opinion on pop star documentaries.Shortly after Swift's Eras Tour film was announced, the "360" singer, 33, revealed she was against having her own Brat Tour recorded. Article continues below advertisementSource: @charli_xcx/InstagramCharli XCX has a 'problem' with musicians who have their tours filmed.