If Team and Tennis Court are any indication of her youtube streaming power, Lorde will probably have a billion streaming song on Spotify before youtube.
But the Royals video is at 483,485,887 (and the original version at 61,262,183) so sometime this millennium.
Katy, a couple days and then a month or so until Roar hits the mark. Nicki, probably in 5 years assuming she doesn't release a SB like smash with streaming at its peak in the next 5 years.
Kelly's Stronger will in about June 3087.
Ellie's Love Me Like You Do (and possibly Burn) will by the end of next year
Gaga's Bad Romance will in like 10-20 years maybe