Leona Lewis will leave 'Cats' next month.

She tweeted: "Wow can't believe less than a month til I leave NY, time has flown by, I'll miss my @CatsBroadway family like crazy!(sic)"

A replacement for the 31-year-old pop star has yet to be announced.

Leona stepped into the role at short notice after Nicole Scherzinger pulled out to be a judge on UK TV show 'The X Factor' and previously admitted the part was "perfect" for her

because she knew it wouldn't be a lengthy stint on stage.

She said: "I'd just come off a tour, I was having some time off and it just seemed like the perfect role because it's not a long commitment."

Leona's performance was recently praised by the show's composer Lord Andrew Lloyd Webber.

He said: "She's doing great. She's been great fun to work with. She came very much in the last moment and I'm very pleased with what she's done."

Though the 68-year-old theatre boss recently admitted he was "furious" when Nicole pulled out of the production because it would have been a "great opportunity" for her, he understood her reasoning and would happily work with her again in the future.

He said: "The thing about Nicole is that she's a wonderfully talented actress and singer. If I could find the right thing for her to work on then I'd love to.

"She really is an extraordinary performer and I in many ways understand why she chose not to do 'Cats'.

"In many ways I'm sad because it would've been a great opportunity for her to be seen in America but at the same time I do understand and we are friends.

"We've both moved on and I have worked with her a few weeks ago at a concert in Austria. And do you know she'd be absolutely a number one person for me to call for a lot of roles."