Pharrell appeared on Saturday Night Live (On Saturday night obviously). He appeared in a sketch and also performed chart topping single Happy and Marilyn Monroe.
http://www.dailymotion.com/video/x1m5k7k_backup-auditions-4-pharrell-snl-with-anna-kendrick_fun
http://www.dailymotion.com/video/x1m5f6d_pharrell-williams-performs-marilyn-monroe-saturday-night-live_music
http://www.dailymotion.com/video/x1m59t2_pharrell-williams-performs-happy-saturday-night-live_music