Everyone, please report to your homeroom. School is in session (or almost) and it’s time to hit the books. Betcha didn’t know artists like Shakira and Madonna are secret brainiacs, both holding IQ’s over 139 which qualifies them as legit “geniuses.” So the next time you’re listening to “Hips Don’t Lie” – give it some serious analysis. Shakira might have slipped in some secret algorithms or something. Check out the full gallery below to find out which 21 musicians are nerding out.