Here's a look back at some of this week's best Late Night moments! (All photos by Lloyd Bishop).
No cocktail is complete without drinking-straw glasses - as Mario Batali knows.
Horatio Sanz joined us on Wendesday as guest announcer.
There may be a Twitter account called "Sad Paul Giamatti", but real Paul Giamatti was full of energy on Late Night.
Taking a vacation from Washington (thanks to the government shutdown), President Obama managed to fit in a trip to Studio 6A in between a busy schedule of Broadway shows.
The Avett Brothers prove that heavy metal is even better when given a bluegrass treatment.