Harry Styles reportedly went on a date with Sky Ferreira behind Kendall Jenner's back. The pop star and American singer Sky apparently spent Friday night at London cabaret club The Box. Harry went to the club with his friend Dave Gardner, and was said to be taken with the blonde star. 'The two of them were together for most of the night and seemed all over each other ' whispering in each other's ears and giggling,' a source tells UK newspaper The Sun. 'They were joined later on by supermodel Cara Delevingne and her sister Poppy and although it might have been weird as Cara and Harry were linked before, the whole group was having a great time. Harry and Sky left at the same time and looked very merry ' they were stumbling down the stairs.' The newspaper goes on to claim Kendall has flown over and is throwing Harry a party at the same club ' The Box ' on Monday night. Her flight was apparently diverted to Newcastle on Friday because of gale-force winds. This is not the first time Harry has been accused of being unfaithful to Kim Kardashian's half-sister. He was also recently linked to Pat Benatar's daughter Haley Grialdo. 'They met in Los Angeles last year at a One Direction concert and have seen each other on the sly anytime Harry's been back in town,' a source told British Star magazine.