Kylie Minogue will play four more London concerts in 2007, after tickets for two initial dates at Wembley Arena sold out in just six minutes.
The singer will now play six dates in London's Wembley Arena
Additional gigs on 5, 6, 8 and 9 January have been announced. The first two of these dates have also sold out.
The singer, 38, was forced to postpone her 2005 tour when she was diagnosed with breast cancer in May last year.
She completed chemotherapy in December but her treatment continues as she tries to make a full recovery.
The Showgirl Homecoming tour marks Minogue's return to the stage.
"The demand for Kylie is absolutely phenomenal and these are the fastest-selling shows I have ever experienced," said her live agent Dave Chumbley.
"It will be fantastic to see Kylie back on stage again."
The singer says her act has been changed to reduce the number of rapid costume changes, because she is still not fully fit.
"I'm as prepared as I can be, but I'm not sure that I'll be able to do everything that I did before," she said in an interview broadcast on Sky One on Sunday.
Minogue went on: "There's a whole other world backstage that happens, six times throughout the show.
"Maybe we won't have quick changes, we'll have slow changes. And maybe even a little chair.'"
A number of tour dates in Australia have been scheduled to take place before the UK concerts, and will begin at the Sydney Entertainment Centre on 11 November.
Minogue's record company, Parlophone, has also said she is working on material which could be released in 2007.