Kelsea Ballerini is a fan of Madelyn Cline —even though she used to date her man! On Thursday, October 10, the country singer took to TikTok with a sweet video praising her boyfriend, Chase Stokes, and his Outer Banks costars after the hit Netflix series released Season 4 on the streaming service that same day. Ballerini was using a filter generator to rank characters from the show at random, though she quickly made it clear there was no real method to her madness, as she admittedly was just looking to promote the new season and clicked on the first related filter she saw. After ranking the ch…