Dam Rihanna's never had a 4-week #1? Work might be her first, I can see it getting 4-5 weeks, until a huge smash comes. We haven't had our Happy/Uptown Funk yet this year, but its coming...
Drake is a huge streaming force.
Work is huge on streaming. Might be a coincidence...
I think Rihanna is also huge on streaming. Isn't she like the most streamed female on Spotify or sth? But yeah, Drake and Rih's streaming power combined is what made the song such a streaming monster.