Kylie Minogue launches social networking site

LONDON (Reuters) - Australian singer Kylie Minogue capped her comeback from breast cancer on Monday with a new single and the launch of a mobile phone social networking site that its designers say is a first for a major pop act.

Her spokesman also confirmed she had discussed the possibility of a world tour in 2008, when she will be 40, but that no decision had been made. Some British media reported a tour had to be cancelled due to concerns over her health.

Minogue, one of the most successful female artists in Britain with hits from "I Should Be So Lucky" to "Can't Get You Out Of My Head", released her new single "2 Hearts" digitally on Monday. It will be in shops a week later.

Her album "X" appears on Nov. 26.

"2 Hearts" has already been branded a "surefire No.1" by the Sun tabloid, reflecting Minogue's popularity in Britain. Her worldwide album sales are estimated at around 40 million.

Having transformed herself from a 1980s soap star into an international fashion icon and top-selling pop star, her appeal was further enhanced by her battle with breast cancer.

"If Kylie won admiration for her pop success, her courage and dignity in the face of her 2005 battle against breast cancer earned the public's enduring respect," Hello magazine said in a profile.

Minogue was forced to suspend her "Showgirl Tour" when she underwent surgery in Melbourne, followed by chemotherapy in Paris where her then boyfriend had a home.

"When you are stripped of everything and you have to grow your eyelashes back, grow your hair back, it's astonishing," Minogue told Glamour magazine in a recent interview.