Jenna Jameson by Denise Truscello/WireImage.com Jenna Jameson by Denise Truscello/WireImage.com

Celebrities are now vying for the position of Donald Trump's "top dog" by taking their business to the streets. Literally.

Seven of 14 celebs on The Apprentice's first celebrity edition were behind two Sabrett hot-dog carts in midtown Manhattan Friday afternoon to tape a challenge for the NBC show. Led by America's Got Talent judge Piers Morgan on the megaphone, the celebrities stopped curious passersby for a donation to charity and an authentic New York street hot dog. At another location, some of the female contestants (including Omarosa, Marilu Henner and Playmate Tiffany Fallon) were manning their own cart.

While Morgan was the moneyman for his team, country-music star Trace Adkins, actor Stephen Baldwin and UFC fighter Tito Ortiz served up the franks. Heavyweight champion Lennox Lewis, Sopranos star Vinnie Pastore and Kiss frontman Gene Simmons handled the crowd, gladly posing for pictures as long as a donation was made and a hot dog was sold.

A few celebrity friends stopped by for a quick bite, including fellow Sopranos actor Bobby Funaro and actress Jenna Jameson. The Donald himself even showed up, along with New York mayor Michael Bloomberg, to check on the progress of the task.

The largest donations of the day came when $5,000 and $10,000 checks were presented to the gracious celebrities by passing businessmen.

"Donald is going to be very proud of us," said Morgan, as he kissed a $5,000 check. - Reporting by Rob Moynihan