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.