Mashup of the Day: Taylor Swift’s ‘Shake It Off’ with Aerobics Video from 1989 in Perfect Harmony

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Is this the new "Dark Side of the Rainbow?"

For some strange reason, Taylor Swift's earworm "Shake It Off" matches up in time with the 1989 Crystal Light National Aerobic Championship Opening video.

You've probably seen this bizarre of the spandex-clad dancers before, but now there's a whole new layer of weirdness and wonder to enjoy.

Prancercise is Back, it is Very Real, and It's Only Gotten More Ridiculous

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Remember Prancercise? Well, it isn't going away any time soon, if this promo video is any indication.

Fashion Fitness of the Day: Jen Selter has the Most Famous Butt on Instagram

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Workout Fanatic Jen Selter had no idea her rear end would get so much attention when she first started posting pictures of her exercise routines on Instagram. Now the 20-year-old New Yorker has one of the most famous rumps in the world, building up an impressive following on the social media platform that includes mega-celebrity Rihanna.

When I heard that Rihanna was following me on Instagram, I was the happiest girl," Selter says. "It just shows that if talent is following you, you're doing something right."

Shut Up and Take My Money of the Day: Google Glass App Turns Your Life Into a Video Game

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An Upcoming App for Google Glass called Race Yourself allows you to...do just that! Not only can you see yourself running or cycling your previous personal record time, you can also escape from attacking zombies, dash from runaway boulders, and create video game-like challenges for yourself on the ski slopes!