Credit: Jordan Strauss/

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.

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.

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!

"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?