Pharrell took the stage tonight on his birthday as the musical guest on Saturday Night Live. The hit-maker performed "Happy," his chart-topping single. Backed by a group of children break-dancers, it was a spirited rendition. Later on in the show, he performed "Marilyn Monroe." For this performance, he was backed by an all-female string section. At the helm of the orchestra was composer and producer Hans Zimmer.

Pharrell also made a cameo in a sketch towards the end of the show. In it, he had to pick a final backup singer for his tour between a pair of twins who tried out together. It leads to a surprising selection.

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