Ke$ha's Naked Butt at 2013 Billboard Music Awards: "I'm Rolling With My Booty Out!"

Find out if the singer is still communicating with the One Direction member

Yes, Ke$ha wore a little black dress to the 2013 Billboard Music Awards, but it wasn't exactly a conservative getup.

The fashion-forward singer went commando!

"I'm rolling with my booty out," she told me. "It's a different look for me. I like to mix it up."

"I wanted to be really naked in every sense of the word, so I went bare with the makeup, bare with the booty," Ke$ha said.

And Ke$ha gave us an update on her friendship with Harry Styles. As we first told you, she and the One Direction singer have been texting pals.

"We're just casual friends," she said. "That blew way out of proportion...Yeah, we text. It's a friendly text. I text a lot of people."

But are they all as hot as Styles?

"He's an attractive young man," Kesha said. "What's not to love?"

For more scoop from the Billboard Music Awards, watch tonight's E! News at 7 p.m. & 11:30 p.m.