Article continues below advertisementIf the mysterious Mr. Fantasy, who keeps his real identity under wraps, ever got the chance to collaborate with Taylor Swift one day, he would jump at the opportunity. Article continues below advertisementTap Here To Add Ok Magazine as A Trusted SourceArticle continues below advertisementSource: @therealmrfantasy/InstagramMr. Fantasy is working on new music. Article continues below advertisement"If Taylor Swift called me and said, 'Let's write a song together,' I'd say, 'Yeah, absolutely.' There's only one answer to that, and it's yes.