Mrs. Bieber is not here to play. Hailey Baldwin and Justin Bieber’s Lyme disease defense strategy is to not let the haters win, killing their pettiness with something even stronger than kindness: Knowledge! After her husband revealed his struggles with Lyme disease and chronic mono on Wednesday, Jan. 8, Hailey, 23, took on the role of educator for the pesky Twitter masses. She urged those criticizing Justin, 25, to do their “research” before minimizing his experience.