All three artists have achieved a billion views for other hits but this is the first time they have each achieved the milestone in 2018.
Mars now has five videos with a billion-plus views, equal with Colombian singer Maluma. Justin Bieber still leads the pack with six videos above a billion.
Rihanna is now equal with Katy Perry and Nicki Minaj with four billion-views videos – the most for any female artist.
Work is Drake’s second video to reach the billion threshold, along with Hotline Bling.