SyCo Entertainment has publicly distanced itself from "Times have Changed," the remixed version of a demo recording by reality-TV sensation Leona Lewis long before she was famous.

Lewis, currently signed to SyCo Music, which is part of Sony BMG Music Entertainment, and to J Records in the U.S., became a recording star after winning the popular U.K. reality-TV singing contest "The X-Factor" two years ago.

SyCo, the venture belonging to music entrepreneur and X-Factor judge Simon Cowell, produces "The X-Factor."

Following international hits such as her debut single "A Moment Like This," and "Bleeding Love" from the best-selling album "Spirit," Lewis has become a household name and was one of the celebrities who closed this year's Beijing Olympic Games.

"Times have Changed" is one of several demo tracks released as a compilation by U.K. ambient soul band Silent Earth that Lewis once auditioned for several years ago.

On hearing about the Sept. 4 release of the track, remixed at Abbey Studios, and now available as a downloadable single on U.K. indie label Jambo Records, a SyCo spokesperson said in a statement: "These tracks are simply demos which were made before Leona even entered 'The X Factor.' Leona has not given her permission for these unfinished recordings to be released."

Silent Earth member and songwriter Dan Karrouze tells "The decision not to use Leona's vocals at the time (of the demo) was because she had told us previously she was going to try for the X-Factor. That meant we would lose her for any live performances and there was a possibility that it may have disqualified her for the X-Factor."

But he denies that the band is capitalizing on her fame for its own ends.

He also adds that the band has no other recording by Lewis. "Unfortunately, there is nothing else," he says.

Lewis' next single with SyCo is "Forgive Me," which has been produced by Akon and will be released on Oct. 27. It is from "Spirit," which is also being re-released in the U.K. on Nov. 3.

She is performing at the U.S. TV charity event "Stand Up To Cancer" today (Sept. 4), which is being broadcast simultaneously on the ABC, NBC and CBS networks.