According to the History's Dumpster weblog, a 45 RPM single version of "Take Life A Little Easier" made Rippy the youngest person ever to hit any Billboard music chart. (The song peaked at #112, good enough for "Bubbling Under.")
Just over a decade earlier, which performer of "Fingertips (Part 2)" had become the youngest solo artist ever to top the Hot 100? He was 13 years, 89 days old at the time.
Stevie Wonder