With so many tracks in Britney Spears' catalog, there's bound to be a leak every now and then. The latest previously unreleased song to hit the Internet is an early version of 'Alien,' off the 'Britney Jean' album.

Fans will immediately notice that it sounds different from the studio version. Most prominently, the leaked song lacks the heavy Auto-Tune enhancement of the released track. However, the track's producer, William Orbit, posted a statement to his Facebook page to clear up any rumors about the leaked audio.

"... I'd like to affirm that ANY singer when first at the mic at the start of a long session can make a multitude of vocalisations in order to get warmed up," Orbit wrote. "Warming up is essential if you’re a pro, as it is with a runner doing stretches, and it takes a while to do properly. I’ve heard all manner of sounds emitted during warmups. The point is that it is not supposed to be shared with millions of listeners."

He continued: "A generous singer will put something down the mic to help the engineer get their systems warmed up and at the right level, maybe whilst having a cup of herb tea and checking through lyrics before the session really kicks off. It’s not expected to be a ‘take.'"

Orbit gives a totally understandable explanation for the song, and rightfully points out that early versions are not necessarily intended for the public. It's an interesting insight into the recording process and gives us a little behind-the-scenes look at Britney.

Listen to the leaked version of 'Alien' above and for comparison, check out the studio version below.

Listen to Britney Spears, 'Alien'