'Dancing' celebrated Halloween a bit late this year thanks to Donny Osmond's bizarre performance last night.

Donny and partner Kym Johnston were in full-out '80s mode as they danced the paso doble to Dead or Alive's 'You Spin Me Around (Like a Record),' which confused the judges almost as much as it did us.

We'd go into further details, but, uh, we think this video speaks for itself.

The judges have been hard on her all season.

But last night, Mya finally won them over with her breezy, '70s-inspired samba. The dance was so good, in fact, that it went on to receive the first perfect score of the season.

Check out the performance after the jump, courtesy if Rickey.org.

After an emotional rehearsal, singer/reality star Kelly Osbourne nailed her salsa routine, and had the judges (yes, even Len) on their feet.

Watch the clip below:

The curse of the flu continues!

Its latest 'Dancing' victim: dancer Lacey Schwimmer, who contracted the virus on Thursday in New York, according to PEOPLE.

Filling in for Schwimmer last night was pro Anna Trebunskaya, who was ousted from the competition three weeks ago with partner Chuck Liddell.

"I have total faith in Anna," Schwimmer said. "I know she and Mark will have perfect chemistry and hopefully I'll feel well enough to cheer them on backstage."

In case you missed it, check out highlights from last night's mambo marathon, which came down to a close dance-off between Mya and Dmitry and winners Derek and Joanna:

Who do you think deserves the boot this week? Vote now in our poll.

'Dancing' hottie Joanna Krupa has agreed to do another, um, revealing photo shoot for Playboy, the NY Daily News is reporting.

The magazine confirmed the news today, adding that Krupa will appear on the December cover.

This will make Krupa a two-time cover girl for Playboy, having graced the cover back in July 2005. She also joins Lisa Rinna and season 7 champ Brooke Burke as one of many 'Dancing' contestants who have appeared in the magazine.

Kelly Osbourne is the latest victim of the 'Dancing' injury curse -- but it looks like she'll pull out of it OK.

Last night, a foot injury forced the singer/reality star to perform the group number barefooted, then sent her to the hospital -- a troubling sign, given the show's track record with injuries.

But according to a rep for ABC, Kelly won't be hanging up her dancing shoes anytime soon. "Kelly has a minor sprain and a contusion from the buckle hitting her foot," the rep exclusively told AOL TV. "She will be able to dance next week."

Is it just me or was Samantha Harris' hairdo the single most distracting part of last night's episode?

As soon as she appeared on screen, I couldn't focus on anything other than her bizarre, frizzy, hot mess of a look. Even as Donny Osmond danced to two perfect 10s, I kept wondering "When will the camera flash back to that serious hair-don't?"

Am I alone here, readers? Or did Samantha's hair hit all the wrong moves?

Is the flu the next 'Dancing With the Stars' curse?

Just days after news broke that season 8's Melissa Rycroft has the swine flu, Derek Hough tweeted that he, too, is sick.

"At the docs for 3 hrs today ... Had a temprature of 104 ... Had an IV in my arm for 2hrs ... Maks is steppin up for me helpin jo," he wrote on Thursday.

Now, ABC has confirmed the story. According to E!, Maksim Chmerkovskiy -- who was eliminated two weeks ago with partner Debi Mazar -- will perform all three routines with Hough's current partner, model Joanna Krupa, when 'Dancing' airs tonight at 8PM on ABC.

'Dancing With the Stars' is planning a tribute to the late Patrick Swayze, who lost his battle with pancreatic cancer on Monday.

The show will honor Swayze, who filmed a guest spot during 'Dancing''s inaugural season, during season 9's live results show, airing Sept. 23.

We assume there will be lots of 'Dirty Dancing.'

The 'Dancing With the Stars' season 9 cast has been announced.

The new line-up -- the show's biggest to date with 16 -- was revealed by Donny Osmond live on 'Good Morning America' on Monday.

Osmond is already shaping up to be this season's frontrunner -- at least according to our poll. Over 29 percent of AOL Television users say Osmond will dance his way to victory. Mya and Olympic champion Natalie Coughlin finished second and third, with 15 and 10 percent of the vote, respectively.

'Dancing With the Stars' premieres Mon., Sept. 21 on ABC.

Check out season 9's full roster after the jump.