iluv: Some store managers allow it, some don't. I think it has a lot to do with how friendly you are with your PS too.
mrsa: I was set on the brown until I saw the sequins against that heather grey. Love it!
I got this tank today at my B&M. I got the brown color though. Luckily it is really cute because the price was painful. I love the neckline though. I really liked this color too. Maybe when there is a promo.