Tulisa: 'I won't be part of the X Factor panel this year'

The singer Tulisa Contostavlos has tweeted that she "won't be part of the X Factor panel this year":

Her tweet continues: "Just wanted to let you all know that I won't be part of the X Factor panel this year.

"I've had a great time on the show, but this year it's time to do something different.

"I'd like to thank everyone on The X Factor for two amazing years. Stay tuned as I have a very exciting announcement soon!"

Open auditions for groups for the new series are taking place in London today.