By Steve Howell Super Bowl commercials have, for some time now, been on a trend of featuring more and more celebrities, in ever intriguing and beguiling ways. Indeed, the NFL has had its very own celebrity endorsement this season, with the Grammy award winning singer, Taylor Swift, dating the Kansas City Chiefs’ tight end, Travis Kelce. Her sheer presence at his games has boosted viewing figures somewhere in the region of an additional 2 million female viewers. Since Swift first appeared in the crowd at one their games back in late September, it’s generated an equivalent brand value in media m…