Alright so I'm designing a couple of icons I need for a campaign. I'm trying to achieve something very similar to the picture in the post.

Its something along the lines of a Spherisize effect in Photoshop.

I'm gonna need to do in Illustrator though, since I need the output in vector format.

The coloring I know how to do, I just need something that will give me this spherical effect.

Anyone know how, or can link me a tutorial?

Sorry for the diminute icon, couldnt find one larger.