After all the Barbie 50th birthday hoopla last year and well into this, prepare yourself for more of the same for her 'arm candy' Ken. In less then 6 months he too will be celebrating the big 5-0 and to celebrate here are some fun Ken facts: His full name is Ken Carson Ken® is named after the son of Mattel founders Ruth and Elliott Handle Ken® is a Pisces — his “official birthday” is March 11,…