Kim Kardashian and her mom, Kris, hit the boardwalk in Santa Monica yesterday to film a commercial for Skechers Shape-Up shoes. It's the latest product in Kim's endorsement empire, after she's touted items ranging from Campari liquor to Charmin toilet paper, QuickTrim diet pills, and even Carl's Jr. fast food. It wasn't all work and no play, as Kim tweeted a few kind words about being able to Read more