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The Billboard Music Awards went  down Sunday night in Las Vegas -- and we've got all the best photos from the blue carpet.

With performances from Nicki Minaj, Bruno Mars, Selena Gomez, Taylor Swift, Justin Bieber, Christina Aguilera and Pitbull -- and additional appearances from celebs like Miley Cyrus, Ke$ha, Hayden Panettiere, new "X Factor" judge Kelly Rowland and Shania Twain -- there were a ton of hot stars in attendance.

But, how did they all look?

J.Lo, Selena and Taylor all stunned with some super sexy looks, while others like Ke$ha and Nicki missed the mark completely.

Check out the gallery above to see all the blue carpet style. Who do you think looked best? Sound off below! 

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