The one-time besties have shared secrets and milestones while battling over boyfriends and even crushes -- most recently, hot English teacher Mr. Matthews (Ryan Eggold) -- for decades. But in an upcoming episode, Kelly doesn't want to walk down memory lane, but instead asks Brenda to help Adrianna, who is a recovering drug addict. Watch what happens!
90210 returns 8 p.m. Tuesdays, starting Jan. 6, on the CW.
