It got even hotter than usual in Las Vegas on Sunday night, thanks to the star-studded red carpet at the Billboard Music Awards.

Miley Cyrus, Carrie Underwood, "Modern Family" stars Julie Bowen and Ty Burrell, Brandy, The Wanted have already arrived -- and Katy Perry, Justin Bieber, Kelly Clarkson and many more are all expected ... with Katy teasing a "hot date."

Keep checking back for all the up-to-the-minute photos from the arrivals line and let us know who you think looks hot ... and who doesn't!

And check out a livestream of the red carpet below:

Live video by Ustream