Va va voom!

Miley Cyrus certainly is all grown up. Sunday night at the 2011 CNN Heroes: An All-Star Tribute in Los Angeles, the 19-year-old wowed in a plunging yellow Roberto Cavalli dress.

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But Cyrus' extreme cleavage wasn't her only accessory; she stunned in platinum and diamond chandelier earrings and stacks of platinum bracelets by Neil Lane jewelry.

PHOTOS: Miley through the years

Boyfriend Liam Hemsworth accompanied the former Disney star for the evening. While the 21-year-old Aussie probably likes Cyrus all dolled up, he thinks she's her hottest when she's chowing down!

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"When I look over at her when she's biting into a steak sandwich and there is some steak sauce dripping down her chin, there is nothing sexier than that," he told Who Magazine earlier this year.

Tell Us: What do you think of Miley's plunging neckline?

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