Superstar Cher is upset her comeback single has leaked as she has yet to put the finishing touches to the track.

The 'Believe' hitmaker is gearing up to release her first album in 11 years, and fans were thrilled when a short snippet of lead track 'Woman's World' made its way onto the Internet and was played in a club in Michigan.

However, Cher insists the song was leaked without her permission, and is angry it has been heard before it was completed.

cher

Cher's comeback single has been leaked

In a series of posts on her Twitter.com page, she writes, "I'm upset about the leak. It's not the End of The World, but don't understand how club in Michigan played min (minute) of it? It's not final mix!

"Vocal sounds different, well there's more but I'm not going to stress, it's just it's my 1st cd in a gazzion yrs (sic) & I've worked so hard on it. Wanted it to come out like it is now.

"I have 2 real problems with this leak! 1st I wanted ppl (people) to hear final mix & we haven't done video! Also record co (company) had changed roll out date to Jan (January). They wanted to have videos finished, world promo tour etc etc to coincide."

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