0 Why #Hashtags Are Stupid... with Jimmy and JT! Matty Merrill 3 years ago Jimmy KimmelJTJustin TimberlakeLate Nightmatty merrillnight showyoutubez103 TV PreviousNext This is AWESOME. I have no idea how Jimmy Kimmel and Justin Timberlake were able to keep straight faces for this. BRILLIANT performance and hilarious real-life observations. Gotta love JT Tuesdays!