Yeah, I know it's a little bit cliche but will Shake It Off and Blank Space's music videos end up with over 1B views each? Here's the current statistics for both videos. Considering Style MV will be released soon, so I guess we will see another boost for both videos's views.
Easily. SIO is getting 100 million views per month at it's current rate and already on approx 530 million views or so. Obviously it's rate will drop as the song fades, but the song is still slayin ww so it won't fade for a while. Plus views only ever increase so even at a slower rate it would get there normally as time passes. Add in the facts that both Taylor and youtube are growing in global popularity all the time and it seems inevitable to me.
BS is racking up views even quicker than SIO. 416 million views in less than 3 months. That's phenomenally quick.