It's Friday! What better way to start the weekend than with Katy Perry's new music video? "Last Friday Night (T.G.I.F.)" is all about having fun and letting loose—a surefire anthem for all your girls' nights out.

And the music video? Think spandex, big hair, neon colors, and acid washed jeans—we're loving the '80s tribute! Also, keep your eyes open for cameos by Rebecca Black (of the "Friday" viral video), Hanson, Kevin McHale, Darren Criss, Kenny G., Debbie Gibson, and Corey Feldman.

So what are you waiting for, FNites? Turn up the volume and play this track while you get ready for your own Friday nights!