London, Dec 16 (IANS): Singer Tulisa Contostavlos is reportedly upset with singer Will.i.am for copying a song she had planned to release as her third song from debut album "The Female Boss".

According to reports, Will.i.am's song "Scream and shout" was originally written by Contostavlos as "I don't give a f***" in collaboration with his close associate Jean Baptiste.

But when Will.i.am, who is member of band Black Eyes Peas, heard the song, he took some parts of it and released it featuring Britney Spears, reports thesun.co.uk.

"The song was due to be Tulisa's third single from her album until Will told his protege Jean that he wanted the beat for him and Britney," a source said.

"Tulisa's team thought it was a surefire hit but, after losing the battle for the rights, they were forced to release 'Sight of you' which only got to No.18. She now has to watch on as the song goes top 5 around the world," the source added.

Contostavlos has now dropped plans to release her version.

"At one point Tulisa was even considering releasing her version to rival 'Scream and shout', but now it's unlikely to see the light of day unless it gets leaked," the source said.

Will.i.am's song "Scream and shout" was released Nov 20.