Miley Cyrus looked more grown up than ever at the Billboard Music Awards. Ever since she ditched her rocker chick look for high fashion she’s been scoring points. But last night, as usual, was over the top.

Cyrus, 19, looked every bit ’60s chic with her hair in a low-riding bouffant, a la “Mad Men,” and her white tuxedo jacket dress by Jean Paul Gaultier was stunning.

Her shoulder length hair also made her look more mature.

Miley Cyrus ’69s Chic at BMAs
(Click Photos to Enlarge!)

But Miley also looked like a wardrobe malfunction waiting to happen. There was of course, no blouse or bra under the jacket and no pants or skirt of any kind. Was she even wearing underpants? Who knows.

There probably was loads of double-sided tape to keep her bare breasts from popping out of her jacket. Her top stayed intact, however, while she was on stage.

As it were the outfit’s plunging neckline showed plenty of cleavage.

Miley didn’t win anything, but presented the award for Top New Artist to rapper Wiz Khalifa. Amazingly her dress didn’t ride up when she gave him a huge hug.

Check out Miley’s sizzling look.