"The Celebrity Apprentice" winners

Leeza Gibbons won season 7 of "The Celebrity Apprentice," topping TV news personality Geraldo Rivera. Other contenders that season included Ian Ziering, Vivaca A. Fox and Johnny Damon. Gibbons raised money for Care Connection, which provides resources for families who are caring for seniors with Alzheimer's disease.

Trace Adkins

Country singer Trace Adkins appeared as a contestant in 2008 but lost out to Piers Morgan. He returned for the "All-Star" season of the show -- and won, raising a whopping $1.5 million for the American Red Cross.

Arsenio Hall

Talk show icon Arsenio Hall was "hired" on the 2012 installment of NBC's "The Celebrity Apprentice." In the season finale, he went head-to-head with "American Idol" runner-up Clay Akien for the "Celebrity Apprentice" title. Hall's charity of choice was the Magic Johnson Foundation.

Singer Aubrey O'Day and comedian Lisa Lampanelli were the runners-up.

John Rich

The 2011 installment of NBC's "The Celebrity Apprentice" saw country star John Rich the last man standing in the boardroom. In the season finale, he went head-to-head with fellow finalist, actress Marlee Matlin. The singer's charity of choice was St. Jude's Children's Research Hospital.

Singer Meat Loaf and rapper Lil Jon were the runners-up.

Bret Michaels

Rocker Bret Michaels won the third season of "The Celebrity Apprentice" in 2010, donating his winnings to the American Diabetes Association. The Poison singer edged out actress Holly Robinson Peete to win the title.

Other runners-up included music manager and TV star Sharon Osbourne and celebrity chef Curtis Stone.

Joan Rivers

Donald Trump crowned comedienne Joan Rivers "The Celebrity Apprentice" in 2009. She topped poker player Annie Duke, who was fired in the season two finale. Rivers donated her money to the organization, God's Love We Deliver.

The other runners-up were entrepreneur and TV star Jesse G. James and Playboy Playmate Brande Roderick.

Piers Morgan

TV host Piers Morgan won the first installment of "The Celebrity Apprentice" in 2008. His winnings went to the Intrepid Fallen Heroes Fund. Morgan beat out fellow finalist, country singer Trace Adkins, who was eliminated in the season finale.

Other runners-up included supermodel Carol Alt and heavyweight champion Lennox Lewis.