Feeling a little chesty, Beyoncé?!

Girl, really?! During yesterday's lunch outting with the hubby, Mrs Knowles-Carter cut it dangerously thin with this unbuttoned shirt in Los Angeles:
This is something Rihanna would pull... only, Rihanna has been keeping it classy these last few months and we've seen her wearing more clothes than she's ever done before. As far as I'm concerned, Bey may as well have left the house with no top on.