Ke$ha: "Hearing Britney is better than drugs"

Ke$ha talks with MTV about writte a song for the Queen of Pop, she admits she's still reeling from Britney Spears' recording of "Till the World Ends," which she penned.

"That song just came on the radio and I have to say, I love hearing Britney Spears sing my lyrics, every single day. It never gets old. I get so excited," she said. "It's better than any drug when you hear Britney Spears sing a song you wrote."

Source: MTV.com