Jeff Foxworthy, is that you? Nope, it's Kelly Osbourne. Photo: Stefan Gosatti, Getty Images

This just in: "Magnum, P.I." is the new black.

At least that's the impression we got from Kelly Osbourne's hirsute turn on Betsey Johnson's Fall 2010 catwalk, where the reality star rocked a fake moustache.

Osbourne, who also accessorized with John Lennon-style specs and an adorable Pomeranian reportedly named Sid, made a surprise appearance at Johnson's Wild West-themed show during New York Fashion Week.

"Sid walked the runway with me for my second look," Obsourne tweeted afterward. "It was so cool, I even got to wear a moustache"

The rock royal, who dished about her love of Lady Gaga's Viva Glam lipstick when StyleList caught up with her at the Alice + Olivia party, strutted down the runway in a variety of looks, from hair rollers paired with a CFDA Fashion for Haiti tee to a green gun-print frock adorned with a sheriff's badge, to a voluminous black ballgown and feathered headpiece straight out of the OK Corral.

And she wasn't the only one getting her Yosemite Sam on. Betsey Johnson also sported a fake handlebar moustache (plus a gun holster and prison-inspired striped long johns) for her signature cartwheel on the hay-strewn catwalk.

How did Osbourne thank Johnson for her modeling stint? Oh, you know, the usual: a pink singing monkey telegram sent backstage, according to the Daily Mail..

'Staches, singing monkeys and Pomeranians? Now that's how the West was won.

Meanwhile, check out our report from the Fashion for Relief Haiti benefit show, which also featured Osbourne on the catwalk.