Heather Mills judges Miss USA pageant

Heather Mills was met with both jeers and cheers as she was introduced as a judge at the 2008 Miss USA pageant in Las Vegas.

The former glamor model -- who was criticized for being "less than candid" by the High Court judge in her $48.8 million divorce case from Sir Paul McCartney -- helped decide the winner of this year's show as it was broadcast live across America on Friday night.

Outspoken Mills, dubbed Lady Mucca by British tabloids due to her porn past, raised her eyebrows as she was both booed and cheered when first introduced to the audience at the Planet Hollywood Resort & Casino by hosts Donny and Marie Osmond.

Heather was smiling and joking with her fellow judges, including Christian Siriano, Joey Fatone and Kristian Alfonso, as the TV cameras panned to her.

When asked what had impressed her the most about the competition, Heather said: "I mean, a long ... 25 years ago, I did one of these competitions, a long long time ago. And it's a lot of work, people don't understand they look for this and work for this for years and years and years.

"Really, really difficult job this, but 20 times harder to walk out there and be brave enough."

Mills' latest TV appearance came just hours after she taunted ex-husband Sir Paul McCartney, claiming he had three girlfriends and adding: "I wish all the girls the best of luck", during an interview with British morning show GMTV from Las Vegas.

Speaking about the pageant, she told show: "I'm here judging Miss USA because Donald Trump contacted my office and said he wanted someone for the charity aspect.

"A lot of people weren't aware that the actual reigning champion and every one of every year has to raise millions of dollars for breast and ovarian cancer and so I agreed that I would come along and be involved for that reason."

Miss Texas, Crystle Stewart, was crowned Miss USA 2008 and will now go on to the finals of the Miss Universe pageant in Vietnam in July.