Top 10 school-themed music videos of all time, starring Britney Spears, Katy Perry, Beyonce and Gwen Stefani

It's Friday and in Katy Perry's own words - TGIF!

Whether you're bummed out over having to go back to school next week or feeling blue about work, we've got two things to say to you:

1) This is a long weekend - HOORAH!

2) We've got the top 10 school-themed music videos of all time ready for your viewing pleasure to help brighten up the rest of your day - MEGA HOORAH!

Here we go...