Canada's best-known advocate for organ donation appeared on The Ellen DeGeneres Show today, just one day after speaking publicly for the first time since her double-lung transplant.

Ottawa's Hélène Campbell, 21, underwent the transplant less than two months ago and before the surgery, American talk show host Ellen DeGeneres promised she would dance with Campbell after the surgery.

The advocate once again spoke via Skype but gave DeGeneres a "dance dare" with a video she recorded. The talk show host then promised to fly the family out to Los Angeles to be on the show in person when Campbell is healthy enough.

Campbell also told DeGeneres more people have signed up for organ donation since her first appearance on the talk show. She added people from as far as the Swiss Alps and South Africa have sent her messages of support.

Busy week for organ donation advocate

On Thursday, Campbell spoke publicly for the first time during a news conference and she convinced members of a respected surgical team to dance with her on national television.

Calling her dance a "movement", she said eventually she hopes to make a commercial showing people from across Canada who have signed up to be organ donors doing the dance.

This has been a busy week for Campbell, as on Wednesday Prime Minister Stephen Harper awarded her the Queen's Diamond Jubilee medal for her unflagging advocacy for organ donation.

Celebrities including Canadian singer Justin Bieber have also picked up her cause.

Campbell was diagnosed with advanced idiopathic pulmonary fibrosis last October and had surgery at Toronto General Hospital on April 6.