Layering CRBs

I don't know about you guys, but when I am running, jumping, squatting, and lunging, my tanks need to be yanked back into place constantly. No big deal. But the other night at my class I was wearing 2 CRBs layered. Guess what? They stayed in place! I couldn't believe the difference. So if you're looking for a reason to justify another Lulu purchase...
Today I'm sporting my Heathered Dewberry and Flare Tonka Stripe CRBs, Angel blue Energy Bra, Black Swan Strike Tight, and my Raspberry Mizuno Wave Creations.