What happens in Vegas will be aired tonight on ABC for the 2012 Billboard Music Awards show.

Carrie Underwood is slated to perform tonight at the Billboard Music Awards.
Though she is not a finalist nominated for an award, many of her country peers are:
Lady Antebellum for Top Duo/Group
Taylor Swift for Top Touring Artist
Both Lady Antebellum and Taylor Swift are also nominated for Top Country Artist --which is in the same category with Jason Aldean, Zac Brown Band and Blake Shelton.
Nominees for Top Country Album are: Jason Aldean ("My Kinda Party"), The Band Perry ("The Band Perry"), Luke Bryan ("Tailgates & Tanlines"), Lady Antebellum ("We Own The Night") and Scotty McCreery ("Clear As Day").
Nominees for  Top Country Song are: "Dirt Road Anthem" (Jason Aldean), "Country Girl(Shake It For Me)"(Luke Bryan), "Crazy Girl"(Eli Young Band), "Just A Kiss" (Lady Antebellum) and "Honey Bee" (Blake Shelton).