Lineart done by toddlergirl
Clouds: http://dark-zeblock.deviantart.com/art/PS-Cloud-Brushes-275420891
Grass: http://fav.me/djjx66
Cake: http://www.flaticon.com/free-icon/birthday-cake_1531
The rest was done by me
If you do critique, please critique anything but the lineart since I did not make it - I just commissioned it.