The 28-year-old Girls Aloud star said people are surprised when they find out that she is actually good friends with the N-Dubz singer, who she has known “for years”.
She told UK magazine InStyle: 'She's lovely. I've known her for years. She came to my birthday party.
'You know what's funny? People are surprised I say I'll be watching and that I'm a fan of Tulisa's, but all they know is what they read in the gossip magazines and it tends to be c***.”
She added: 'They base their opinion on something they have no knowledge of, they don't know the facts or the truth and it drives me mad.'