Alicia Keys and husband attend Pharrell William's birthday party.

American songstress Alicia Keys and husband Swizz Beatz attended Pharrell Williams 41st birthday party on Friday night.  Alicia, 33, looked stunning (as ever) in an elegant blue jumpsuit and creme jacket.

After taking pictures on the yellow backdrop featuring animated characters and a Happy birthday Pharrell hashtag, the couple headed inside to celebrate and take pictures with the birthday boy.

See more pictures after the cut...

The couple and the birthday boy.

The birthday boy in oversized hat and mis-matched shoes.

The monster birthday cake.

**Happy birthday to you and many happy returns.