I feel like making myself a new bellydance costume. I believe I've learnt my lesson from the last attempt and I will only use stretch fabrics for covering the bra :-]
The pattern. I put the lovely blue fabric on the cup and pinned it on, eliminating every wrinkle by stretching it, mainly diagonally. Then I cut it out leaving a 1.5cm seam allowance. I cut the other half symmetrically. The result should resemble a rectangle more than circle...I pinned it on again. Those who are not lazy can baste the right side at the edges - it simplifies the work a lot.
I folded the seam allowance in a half and carefully attached it to the bra. It's ok to pull a bit to keep it smooth.
Just tiny little stitches. If you baste it, you can get rid of the pins.
Around the cups, I sewed tiny back stitches.
You can see the brown fabric too - it's tie-dyed and has some blue spots :)
The center is probably the hardest part. Not much space to manipulate...