Well well, it's going to be a big week for Streaming when Nielsen releases their numbers, last year Grammy's had an amazing effect on this department. The data I have:
Mark/Bruno's mega smash "Uptown Funk" keeps increasing WW with 32.7M this week (+7%)
Ed's "Thinking Out Loud" saw a really big increase to 24.5M WW views this week (+21%)
Taylor's "Blessed Space" keeps dominating YouTube as it pulls 36.3M (seeing a decrease tho of 2%). It could be because there's too much Taylor Swift right now: "Shake It Off" also decreases 2% to 22.9M views this week. And she has a new debut "Style" with 10.2M WW after only 3 days.
Hozier is also one of the biggest gainers this week, "Take Me To Church" pulls 10.9M (+22%)
But.. maybe the biggest winner should be Sam. Unfourtanely I didn't track SWM earlier this week, I just forgot it

but if we talk about the non-performed "I'm Not The Only One", it gained 36% to 14.1M WW. Imagine SWM, which also has the Live Performance uploaded to his VEVO Account with 1M views
Ellie also got a amazing boost of 33% with "Love Me Like You Do" (16.5M WW). And not least important The Weeknd's "Earned It" went up 77% this week to 5.3M
Keep an eye on Stay With Me and Chandelier. I don't have the numbers but I know they increased a lot. Plus, "Chandelier" live performance is at 4.6M