NO. THIS IS NOT A FLAMEBAIT/TROLL THREAD.

Normally, songs that are selling well are usually decent-to-huge radio hits. There are some instances where that didn't apply. Most recently, this has happened to PSY's global hit "Gangnam Style."
It was #1 on Hot Digital Songs and #1 on iTunes for quite some time. Radio supported it during the initial buzz/hype, but once it reached the 65-70M mark in audience impressions, radios began to pay it dust, and it tumbled in airplay (despite it being the top-selling song over the then-#1 Hot 100 song "One More Night").
Miley's controversial hit, "We Can't Stop," has been perched at the #2 spot on Hot Digital Songs and iTunes for weeks, and her radio updates are doing okay. As of today, she currently has 40.3 million overall audience impressions, and she ranks in at 16 on the Mediabase Pop Songs chart.
Do you think radios will pay it dust, or do you think they'll fully support it to its highest potential? She's currently charting on the pop songs chart (as mentioned) and on rhythmic.
Discuss and keep it cute.