Leave it to Pharrell to get creative with his performance!
The 41-year-old singer celebrated his actual birthday in a fantastic way: by singing on Saturday Night Live!
And to make sure it was extra special, he had a little help.
First, Pharrell sang his well-known hit Happy, but then he brought out Hans Zimmer and a string orchestra for the performance of Marilyn Monroe.
As usual, he was wearing that hat too…