Rob Lowe prides himself on never breaking character by laughing when filming. Ellen prides herself on making people laugh -- and never backing down from a challenge! Watch now to see how Ellen tried to get Rob to laugh, and whether or not she succeeded!
- Hillary Clinton Plays Who'd You Rather? Outrageous Patriotic Outfits Kanye Keeps It Real -- Extended! You've Found the Latest 'Finding Dory' Trailer The 'Ghostbusters' Cast's Past