Little Mix were banned from speaking to Rihanna when she made a guest appearance on The X-Factor last year.

Speaking to We Love Pop magazine, Little Mix singer Jesy Nelson said: ''We were on The X Factor with Rihanna and Lady Gaga. Lady Gaga was amazing, but we didn't get to speak to Rihanna.''

Her bandmate Leigh-Anne Pinnock added: ''Her management wouldn't let anybody meet her, but she walked past me and said, 'Your hair is awesome!' This was when I had my head half shaved, which I hated, so it cheered me up.''

Meanwhile, Leigh-Anne Pinnock explained that she wants Little Mix to be the biggest girlband in the world, saying: "I want us to be the biggest girlband in the world.

"You've got to aim high. I'd like to achieve that within three years."