Who was the first jazz artist to sell one million records?

Answer~Cab Calloway.

Sorry for the delay in posting the answer the night of the 30th we had MOVIE NIGHT!!! We saw White House Down with Jamie Foxx. Good Movie!! Then yesterday into last night the power was out for HOURS due to a thunder/lightning storm. I was so aggravated until I just went to sleep and woke up in the wee hours of this morning. It’s raining now, so power isn’t promised. I just hope we don’t lose power again. It had been awhile since that happened being without power for hours, a few minutes 1-30 minutes, so I had gotten spoiled. Have a Good Night!! As always Be Blessed and Be a Blessing to Others.