I made some calculations and if even demetria has +0 updates this week (which I doubt will happen) and the decreasing songs decrease at the same rate.
Demi will pass adele in 4 days
Demi will pass Calvin in 6.4 days
Demi will pass katy in 9 days
One direction seems like the only threat, and it will take them 9 days to pass her if she has +0 updates. So next week she will be #18 likely. And remember i calculated these assuming she would get +0 updates
