She may have trouble keeping a man , but she IS making a TON of money...... Kim Kardashian's apparel brand, Skims, is 4 years old and worth $4 billion. Why it matters: It's a tour de force by Kardashian, who's already a billionaire and spawned a number of successful … [Read more...] about Kim Kardashian’s apparel line Skims is worth $4 billion…..