Team Zutara-Collab

Does anyone know how to make the background transparent... like this
[link]
i can figure it out
OKaaay so that's me... i kinda messed up with the head my face is more narrow and round though. oh well.
Anwyas this is for a collab with [link]
We had to draw ourselves in a shirt with a team on it. I wanted to be team sasusaku but that was taken so i choose the next best thing. ZUTARA!!! So yeah... im black in case you didnt know XD XD not that it's not a big thing. I hope O.O jk
Oh im 5 feet by the way and 1/2 a inch XD
Im short! im 15 by the way XD and im flat like Sakura and really skinny. XD
anywayssss...... That's all i have to say
Oh and i give maboroshii permission to use.
heeeeyyyy im Kaataarara!! which means im zukooo wifey!!!!!!!! hehehehe