Drew BarrymoreDrew BarrymoreWhen stepping out for a dance, a bra is advisable.

It is a sport of such, so one must dress accordingly.

Otherwise, a wayward breast could cause injury.

And, should you be of the bigger variety, the loose boobs might whack someone else, as well as yourself, on the dance floor.

The lawsuits filed against you could be considerable.

So quite why Drew Barrymore took the risk of dancing sans support is unknown.

The actress had herself a bra-less jig at the opening of LA store The Echo.

Take a look at the pictures above and see whether Drew was just lost in the music.