James Corden and Emily Blunt [1] go way back. So far back, in fact, that the Into the Woods [2] costars decided to test their friendship with a "Shock Therapy" quiz. "Emily, we are old friends," James said on The Late Late Show [3] on Wednesday night. "We've worked together; we did a film, Into the Woods, together; I've hung out with you and John [Krasinski]; you and John have spent time with me and Jules [Carey]." Despite their longstanding friendship, they had some trouble remembering a few basic facts about each other, and the results were expectedly jolting. Watch the full video here to see James try to remember the names of Emily's kids [4] and to see Emily get a shocking surprise when she can't recall the name of the song she and James sang together when they first met.