''Gru was a character who’s always agitated, he’s like this deadpan, Grandpa humour, he’s always in a bad mood. And so the whole of the first film was about him being always in a bad mood, and it was very funny. For the second film they popped this on me like, ‘hey, Gru’s in love and he’s very happy’ and I was like ''what?' So the challenge was how do you make a song for a guy that’s perpetually in a bad mood? Always irritated? And he’s now just fallen in love. Who’s just happy and nothing can bring him down?'' - Pharrell Williams
"With 'Happy' I went through everything that I thought was possible in my mind based off of what I understood about Gru and what I thought the people needed in terms of what the studio was looking for, and none of it was working. It was only until I was tapped out that I had to ask myself the fundamental question: they're asking for a song that's happy, they're asking for something where Gru is in a good mood, and that's when I realized that everything I needed was right there. I began to ask myself, 'What does feeling like a good mood feel like?' That's where 'Happy' came from, and that's how that happened.'' - Pharrell Williams
''When I do a song, if my wife is there at the studio with me, we’ll leave and then we’ll listen to it one time when we’re out. So we listened to ''Happy'' and we ended up driving round for an hour and a half listening to it'' and we were like, I don’t know what this is, but it feels good.'' - Pharrell Williams
''THE STORY BEHIND THE SONG''
(click on the image)