by Chelsea StewartBuzzFeedBuzzFeed StaffI'm Chelsea, the Weekend Editor at BuzzFeed, where I cover everything from pop culture and politics to TV and celebrity news. JoJo Siwa's dress at her brother's wedding is getting quite a bit of attention online. Paul Archuleta / Getty Images Her brother, Jayden Siwa, wed his girlfriend, Abbie, on Feb. 28, and this week, JoJo uploaded pictures from the ceremony on Instagram.