Celebrity Paula Abdul came to host the final hour of Bust a Move on Saturday. ((CBC))

For the second year in a row people in Halifax on Saturday were sweating for a good cause.

Bust a Move is a six-hour workout broken down into six fitness sessions including yoga and zumba. This year the money raised by participants will help retrofit a women's breast health centre, so it can be a one-stop service centre for patients.

The event, which began in the morning, is put on by the Queen Elizabeth II Health Sciences Centre Foundation and the IWK foundation. The fundraiser takes place at the new Canada Games Centre in Clayton Park.

Saturday's fundraiser will see 800 participants that each had to raise $1,000 to take part. Last year, 750 people raised $1.1 million to buy a digital mammography machine.

Last year fitness celebrity Richard Simmons took part.

This year it's Paula Abdul's turn to host the final fitness class.

Bill Bean, the CEO of the QEII Foundation, says a key part of the event are the corporate donations.

"Our sponsors' money go to the expenses of the event. We try to maximize that so that a majority, if not all of the money raised by participants, goes toward the cause. That's the beauty of this event," Bean said.

While corporate sponsorship is down this year, Bean said his organization has received more than $250,000 so far.

The total cost of the fundraiser is $300,000.

The final tally was $863,500 raised.