Bob D'Amico/ABC
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April 28, 2015 10:55 PM

Ten years and 20 seasons of Dancing with the Stars culminated in Tuesday’s special, an anniversary spectacular filled with as many sequins and skin-baring outfits as a fan would expect.

Stars and pros past and present were on hand to mark the occasion on the dance floor. Aside from its hardcore nostalgia factor, the special featured an insane opening number (including almost 50 stars, judges, hosts and pros and pregnant Welsh chanteuse Katherine Jenkins!) and some visits from former fan favorites.

Kicking off our top moments of the night …

Kelly Monaco & Val Chmerkovskiy Reunite, Get Naked
The fact that these two weren’t even given a full performance slot and only penciled in as a “rejoin” is an utter travesty. The season 1 winner reunited with her season 15 All-Stars partner, and things got well, wet. Both were in nothing but their skivvies (yay, Velcro tear-offs) and splashing around in a puddle within 30 seconds, leaving alum Betsey Johnson – and all of America, for that matter – mouthing, “Oh. My. God.”

To keep reading, visit EW.com.

Dancing with the Stars airs Mondays (8 p.m. ET) on ABC.

On sale now: PEOPLE’s 10 Years of Dancing with the Stars Collector’s Edition, available in stores here and for digital download here

PEOPLE's 10 Years of Dancing with the Stars

Bruno Tonioli’s Most Insane Dancing with the Stars Moments

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