A day after celebrating International Day of Happiness, Pharrell Williams is continuing his 'Happy' streak with a new T-shirt collaboration.

The producer has teamed up with Peace Love World to launch a collection of limited-edition tees inspired by his Oscar-nominated tune.

The 'Happy' T-shirt features PLW's smiley face brand wearing the iconic Vivienne Westwood "Buffalo" hat with the tagline, "Happiness is the truth."

The shirts come in sizes small to extra-large for men, women and children. You can pre-order them now at all Peace Love World's online store ranging in prices from $25 to $45. The tees are also available at Billionaire Boys Club.

If you are still in the happy spirit, Skateboard P has another collection of T-shirts available at Uniqlo.

A limited run of 500 'i am Other' tees are now available for $19.90 at Uniqlo's webstore. The full line will be previewed on March 31 with the collection available worldwide on April 14.