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X Factor group Rhythmix have been renamed Little Mix after a charity with the same name threatened legal action.

The four girls said they had come up with the new title after talking about it with their mentor, N-Dubz singer Tulisa Contostavlos.

They said: "When we came up with the name Rhythmix, we had no idea that there was a charity with the same name.

"We decided to change our name to Little Mix as we do not want to cause any problems for the charity."

The Rhythmix charity, which was set up in 1999 and is based in Brighton, organises musicians to work with hundreds of disabled and vulnerable children every year.

It hired lawyers and wrote an open letter to show boss Simon Cowell asking him to intervene.

"We're happy that this has now been resolved," the girl group added.

"We're the same girls as we've always been and we want to thank all of our fans for their continued support of us.

"We came up with some ideas for our new name which we discussed with Tulisa and she had some ideas too. We all agreed on Little Mix as it just felt right.

"We're so excited to perform on Saturday and hope everyone is impressed with what we do."