The above image is by Little Digits as is the one below. I like the whimsical style of her art, but as with many things that are posted to Tumblr the original source was hard to find, even though they are signed. Little Digits is actually quite prolific and it’s worth looking through her Tumblr blog.
This image is probably fairly accurate, especially the last one… I can’t actually remember where I found this though, It was just open in a browser tab. Probably posted by someone one Twitter or Facebook.