yeah, magic ;D
puff! i guess this covers the basic understanding on how to do these magical shiny bubbles :] to add, you can always do this your way and take out of my tutorial whatever fits your approuch... hope its helpful!
bubble progression from (top) left to right.
watch Magic Bubbles LWP
VIDEO -
[link]me on
TWITTER ...
YOUTUBE------------------------------------------------------------------------
used tools: photoshop, paint tool sai and wacom tablet.
OTHER tutorials :

Used it here [link]
I used it here: [link]
If you want to see my work:
[link]