Hilary Duff & 'OITNB' Stars Take Over iHeartRadio Music Festival

Hilary Duff looks super sexy while posing backstage during the second night of the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on Saturday (September 20) in Las Vegas.

Other stars at the festival including Orange Is the New Black stars Laverne Cox, Dascha Polanco, and Pablo Schreiber, as well as The Big Bang Theory‘s Johnny Galecki.

“Oh hey oh #vegas ….. Your nice and hott,” Hilary tweeted that morning.

FYI: Hilary is wearing an Anthony Vaccarello dress, Christian Louboutin heels, Renee Sheppard earrings and Alexis Bittar bracelets.

Also pictured inside: Hilary walking around Toronto the day before after doing some promo for her new music.