Kerry Katona has revealed she almost had sex with former Take That star Robbie Williams around 16 years ago.The 39 year old former Atomic Kitten star revealed the closest she’s got to a “big celebrity sh**g” is none other than the 46 year old Rock DJ hunk, who is now happily married to Ayda Field.Writing in her new! column, Kerry revealed the rendezvous with the pop star almost happened after they met backstage at Ant and Dec’s Saturday Night Takeaway, “soon” after her split from Westlife singer