Football legend David Beckham is suing showbiz pal Mark Wahlberg after a deal in his gym franchise F45 went sour. Becks and his company DB Ventures Ltd claim he was “duped” into becoming a global ambassador for the Aussie-made gym franchise and is $16.4 million out of pocket after stocks he was promised were withheld until after the share price plummeted. The British star is also suing the actor’s investment firm and F45 founders Adam Gilchrist and Rob Deutsch. They say the claims are baseless and want the judge to dismiss the case that alleges fraudulent conduct. But it’s not the only issue facing F45/Wahlberg… Golfer Greg Norman is also suing over claims he wasn’t properly paid for his endorsement. And last year, reports stated F45 was “hanging by a thread” after huge financial losses of $582 million in 2 years were revealed.