The 59-year-old spoke about his X Factor co-judge and it sounds like they’ve really hit it off.
“We 100 per cent have a genuine friendship,” Louis told Now’s Dan Wootton.
“She’s rough around the edges but that’s what I like about her. You go into her dressing room and they’re smoking and drinking.
“She can be a bit of a loose cannon, but she cares. I love her honesty. What you see is what you get.
“I know more about Tulisa than I do anyone on the programme.”
Louis thinks Tulisa has true star quality.
“I think she has the potential to be absolutely enormous,” he said.
“But sometimes she thinks she knows it all when she doesn’t.
“She talks about the N-Dubz like they’re The Beatles but I didn’t know who they were before the show.
“I didn’t know who she was either!
“Not everyone loves the N-Dubz – they’re not the Black Eyed Peas.
“But I love her. And it’s not a put-on thing for the cameras.
“I just can’t do fake any more.”