Amazing Scientific Discoveries, Part 1

When he's not holed up in The Seagulls Foundation's top secret basement laboratory, Josh hangs out at the public library, enjoying a good graphic novel and a refreshing carbonated beverage(decaf, please!) or just shooting the breeze with amateur anthropologists. This week, he uncovered a little known historical fact: cell phones weren't very popular in the 80s.
A picture of Guido Menudo taking an important call during a song. This couldn't have happened in the 80s. Or could it?