When Bristol Palin walks down the aisle with babydaddy Levi Johnston, one person won't be jumping for joy: Sarah Palin. In fact, the ex-governor is so angry about the plan that she's going to boycott the wedding, reports PopEater. "Bristol is very upset about her mother's decision and hopes her dad, Todd, will be able to change her mind," dishes a friend of Levi's. The young couple are paying for their own wedding, and Bristol's pop, Todd, will be there. "He's been looking forward to this day ever since Bristol was a little girl," says the friend.