now it's not THAT clear that sorry will overtake hello on hot 100 at all, b/c overall Hello is still bigger on radio, is dropping small amounts, aswell as still being huge on streaming.
sorry is stalling on Itunes. LY (which is a Little better than sorry) will keep gaining on Itunes, but itīll take awhile Before it takes over, it's faaar below on radio still and streaming is (i guess) equal with Hello at this Point?
hmm, will Hello actually stay #1 more weeks than we thought?
not that mariah's record 16 weeks is in danger really, but ...? i mean bieber is the only threat now and for a while. this fall/Winter really turned into a 2 horse race in the singles department, altho Adele Always had the edge
Adele NBC reairing next week 
Sorry will have a boost as the ultimate party song for NYE and such as well or so
