The 23-year-old N-Dubz singer was already paid £450k for her debut stint on the show this year, but The Sun claims that she will get "just shy of a million" if she returns next year.
Apparently boss Simon Cowell has been impressed with the way the Londoner has handled herself and guided her group Little Mix to victory.
A source on the show was quoted as saying: "She's stuck by Louis and learnt a few tricks of the trade from him.
"Plus, she sticks to her views. Weaker people might have retracted what she said about Misha B hassling Little Mix to keep things upbeat but she didn't. The producers love her."