Robin Williams Serenades Conan O'Brien With Profanity-Filled Irish Jig (VIDEO)

Last night on 'The Tonight Show,' Robin Williams serenaded Conan O'Brien with a profanity-filled Irish jig expressing a none-too complimentary opinion of NBC and its executives.

Williams appeared on the penultimate 'Tonight Show' featuring O'Brien as host and belted out the dirty ditty, which came complete with rude hand gestures and Irish step dance.

Watch the video after the jump.Last night on 'The Tonight Show,' Robin Williams serenaded Conan O'Brien with a profanity-filled Irish jig expressing a none-too complimentary opinion of NBC and its executives.

Williams appeared on the penultimate 'Tonight Show' featuring O'Brien as host and belted out the dirty ditty, which came complete with rude hand gestures and Irish step dance.

Watch the video from TV's Top 5! below.

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