It's a Parry Gripp song. Yup.
Song: https://www.youtube.com/watch?v=I6y_2MMS2Os Pictures: https://smilingcat01.wordpress.com/why-a-smiling-cat/ http://www.viralsilo.com/must-read-this-is-the-15-smiling-cats-that-are-taking-the-internet-by-storm/ http://www.space-cow.com/2013/12/smiling-cat-head-tilt.html http://kittentoob.com/cat-news/the-daily-strut-epic-tower-battle-sweet-kitty-kisses-how-to-make-your-cat-happy-cat-lovin-swag-and-finally-a-cat-whisperer/ http://www.littlethings.com/grumpy-cat-memes/ There's more. Sorry I didn't want to bore you.
