Did you know that the Jackson's had a deal with Post? It seems like this was a no brainer being that "ABC" was a big hit in 1970!

The Jackson 5 was one of the first black groups to successfully crossover with The Supremes, The Four Tops and The Temptations. They were the first group to have their first four singles reach number one on Billboards Hot 100. Those songs were "I Want You Back," "ABC," "The Love You Save" and "I'll Be There."

Check out these commercials they did back in the day. I never knew this interesting fact, but of course I was not born then either.