United Kingdom, Sept. 5 -- Kimberly Wyatt has hinted that the Pussycat Dolls' comeback tour could be their "last".

The 44-year-old singer is joining Nicole Scherzinger and Ashley Roberts on the road, but the trio were forced to scrap 33 dates in their native U.S. due to disappointing sales.

They're due to kick off the European leg of the jaunt in Denmark on September 9, which will conclude in London on October 13, and Kimberly has how given an interview in which she appears to have given a disappointing update about the reunited group's future.

She told the Daily Mail: "I think going on stage knowing it could be your last is something really special because you don't miss any of those moments.

"I think we're all in that same headspace...