It's used in a lot of Tumblr banners and I was just wondering if anybody could identify the font.

that's not a font, actually a girl from tumblr does those drawings, and in her tumblr she says that you can use them as tumblr banners.

here's the url
http://a-r-t-e.tumblr.com/

I love this. wish it was a font i could use in photoshop.