It's that riff. You know, the one that gets so completely lodged in your brain that it takes weeks to get replaced by another ditty? That's why I fear listening to Europe's 80s monster-rock hit, 'The Final Countdown.' It's literally impossible to get it out of your head once you hear it and that's why I've collected a list of the DEFINITIVE 'Countdown' cover songs on the internet. And if you happen to hear someone whistling the chorus as they splash into the water below? Call 911 because they'll definitely need an ambulance.

• Never will you see such gusto on a cello. Headbanging included!

• What do you call a ukulele, baby piano and kazoo combined? Why a Kazookeylele, of course!

• The worst cover band in the world, seriously.

• My all-time favorite cover artist, manualist Gerry Phillips, does 'The Final Countdown' with his hands!

• If you're not aware with popular YouTube trend, 'Chipmunking', this one might sound a little... off.

• YouTube user 'Klingonmastr' (I swear that's his name) does a cover version to "beat all other cover versions."

• We didn't purposely find all the bad ones! This acoustic version is quite lovely.

• Ah, the famous solo. It's probably best to do it with your shirt off, right?

• You've certainly never heard Europe played on the Carillion -- certainly a MUST.

• Think you're better than the rest? Try a go at your own cover version of 'The Final Countdown' with this karaoke version -- complete with lyrics and background vocals!!!!!

• related:// The Definitive List of 'Bohemian Rhapsody' Cover Songs on the Internet