After several months with "no promotion" she still tops these charts. I think there is a natural wind at her back when she does release something and promotes it. Being nearly 8 months on top should be something noteworthy.
http://iheartmusic.com/new2/discover/index.html?format=185
http://iheartmusic.com/new2/discover/index.html?format=177
http://iheartmusic.com/new2/discover/index.html?format=169
http://iheartmusic.com/new2/discover/index.html?format=185
http://iheartmusic.com/new2/discover/index.html?format=177
http://iheartmusic.com/new2/discover/index.html?format=169