The 66-year-old '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 said that the song was leaked without her permission, and is angry that it has been heard before it was completed.
In a series of posts on her Twitter 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 is more but I'm not going to stress, it's just it's my first CD in a gazzion years (sic) & I've worked so hard on it. Wanted it to come out like it is now," she said.
"I have 2 real problems with this leak! First I wanted people to hear final mix & we haven't done video! Also record company had changed roll out date to January). They wanted to have videos finished, world promo tour etc to coincide," she added.