Pharrell Williams lets Oprah try on his hat
Pharrell Williams lets Oprah try on his hat

Pharrell Williams, complete with his signature Mounties hat in green, stopped by Oprah Prime to discuss his Oscar-nominated "Happy." The segment reduced Williams to tears of joy when Oprah showed him a video mashup of people throughout the world grooving to the catchy "Despicable Me 2" theme song. Watch below.