Today’s Rock ‘n’ Roll High School comes from totally rad blogger and writer Jenna Cosgrove. If you haven’t checked out the fresh and fun Pop Eighties blog, you need to get on the stick. Jenna is part crazy and part super generous, as she was willing to give me an entire week on Pop Eighties to spout off about the 80s one-hit-wonders that should have been more (The Plimsouls! Hello?), play guest VJ, and do a Q&A about Bring Me Back. A round of applause for Jenna! The…