You girls not understanding.
Gaga was a streaming monster back in 2009-2011, it's just that she couldn't keep up with the changing time. The reason her video views are less then the other pop girls is because she peaked before and has been declining ever since. Recurrent video plays are what the other girls have above her because the video views for Gaga videos were huge during the years they were released.
Not being under a lot of "suggested videos" on YouTube has a lot to do with it too. You go to a Katy Perry video and you get suggested videos from Meghan, Taylor, Rihanna, etc. Gaga is under less viewed videos like Britney and Madonna.
at least I've always seen it like that.
And really, look at how many videos are over 500 million or 600 million, something very uncommon for 2010 video views.
I mean, Gaga was at one point the most liked on FB, most followed on Twitter, some of her tweets were among the most favorited/retweeted, most viewed on YouTube, most subscribers, had the most viewed video ever, etc etc
I remember her reaching 1 million subscribers was absolutely huge.