Britney Spears details new single, artwork

Britney Spears was busy on Twitter last night. She confirmed that the demo version of her new single "Hold It Against Me" that leaked this week was real and that her version would arrive at radio on Tuesday. She also unveiled the artwork for the song, which is the first single from her still-untitled forthcoming album, due out in March.

"If u think that's good, wait til you hear the real one Tuesday," she tweeted.

The demo of "Hold It Against Me" -- a lyrical play on the Bellamy Brothers' country classic "If I Said You Had a Beautiful Body Would You Hold It Against Me" -- is uptempo and Euro-dance influenced. However, producer Dr. Luke says that Spears' version has changed, tweeting, "It don't sound like that anymore... it's WAY better."