Just ask British icon Daniel Radcliffe!
The only problem??
Just look at their sad, sad faces!!
Ch-ch-check out the clip to see Anna & Justin's priceless reactions (below)!!!
[Image via itv.]
Not only did the Confident singer get the littlest Jonas brother to talk about his dating life, but the two helped Corden belt along to their hits like Heart Attack, Chains, and they even busted out DNCE's Cake by the Ocean!
And always remember to watch The Late Late Show with James Corden weeknights at 12:37 a.m. EST on CBS!