Source: Bang Showbiz NewsTaylor Swift plays down her rivalry with Michaej J. Fox after the actor seemingly told her to stay away from his son Sam.Their feud followed Tina Fey and Amy Poehler's skit at the Golden Globes last week when they warned the 'I Knew You Were Trouble' hitmaker away from Michael's son Sam.The 'Back To The Future' star was asked about the singer in an interview with Vulture.com, and whether he'd allow her to date his son.Michael, 51, said: "No. No ... Just back off ... I don't keep up with it all. But Taylor Swift writes songs about everybody she out with, right? What a way to build a career."He implied his son would become a subject of such a track, jokingly suggesting 'Sam, You Piece of S**t' as a potential title.Although it seemed the actor slammed her, Taylor's now taken to Twitter to say they have no issue.She wrote: "Hey everybody, Michael J. Fox got in touch with me today and we are good. Thank you for having my back."However, his son cheekily retweeted and added: "Hope he gave her my # [number]."