Miley Cyrus shorts smoking cigarette silk shirt Miley Cyrus shorts smoking cigarette silk shirt

She's just bein' Miley!

It may have been Labor Day, but rather than hitting the beach or heading to a pool party, Miley Cyrus busted her booty at the recording studio on Monday afternoon. And no, she wasn't twerking here ... just extinguishing her cigarette on the ground after puffing away with a few pals. But what's with the middle finger, Miles? She tweeted, "ain't nobody got time for that #BS..." Wonder who that message was intended for?

The other day Sunday People posted an interview with Miley, and the 20-year-old starlet revealed that she is a self-described workhorse who only sleeps 45 minutes a night sometimes. Miley added, "I have so many f**king issues ... I am so f**ked up."

Maybe once she's done with Bangerz she should take a vacation before heading out on tour? We don't want our Miles having an Amanda Bynes-style meltdown!