Tears of joy. They flowed from the face of Jessica Simpson after Eric Johnson, her boyfriend of less than six months, proposed to her November 11.Opening up about her recent engagement during a Monday appearance on The Early Show, Simpson called Johnson's proposal "a total surprise.""I had to sit on his knee; I was too shocked to really get what was happening."Eric Johnson will soon become Mr. Jessica Simpson.What was her reaction when Johnson, a Yale graduate and former NFL tight end, presented her with a ruby, diamond and gold Neil Lane sparkler?"I first said 'Yes!'" Simpson told Harry Smith, giggling. "I didn't even try the ring on for 5...