Dancing With the Stars is celebrating its 20th anniversary this week, and pro-turned-judge Derek Hough is calling out the "hardcore, amazing fans" to help him out.

In an Instagram video , Hough challenges fans to dig deep and find some of their favorite moments over the past 20 years.

"Holy cow, ladies and gentlemen, 20 years of Dancing With the Stars ! Can you freaking believe it? It is unbelievable. I am so thankful to be part of such an amazing show. I'm calling out all the hardcore amazing fans who've been here from the beginning, who can go down memory lane and can find some really deep cuts. Deep cuts that we might have forgotten about, but you're just like, 'no, no, no, no, we have to bring this back up. It's too amazing.

"It could've been a performance, it could've been

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