"The Celebrity Apprentice": Clay Aiken vs. Arsenio Hall

(CBS News) The final "Celebrity Apprentice" showdown will take place Sunday.

Arsenio Hall and Clay Aiken are the last two standing, and $250,000 for charity is on the line. Who will be named "The Celebrity Apprentice"?

Pictures: "The Celebrity Apprentice"
Pictures: "The Celebrity Apprentice" winners

They must stage their respective charity events before Donald Trump crowns the season's winner in the live finale.

Last week, meanwhile, saw the departure of pop singer Aubrey O'Day.

When asked if she thought she deserved to be in the final two, O'Day told Entertainment Weekly, " Absolutely. I mean, just in watching last night when Trump asked us all why, I was the only one out of the three of us to say that I was the strongest player there. I mean, it's a confidence factor, it's just a fact. I worked the hardest, I had the most ideas, and the thing about this show is, it's not a show about building teams."

"The Celebrity Apprentice" season five finale airs Sunday at 9 p.m. ET/PT on NBC.

Also, get the inside scoop on "The Celebrity Apprentice" from former contestant Debbie Gibson: