Say what you will about Kendrick Lamar's music partnership with Taylor Swift, but you can't say it hasn't been fruitful.

'Bad Blood', the Taylor Swift song recently remixed with two verses from K.Dot, has just hit number one on the Billboard single charts. It's the fourth chart topping single from Swift's multi-platinum album 1989, and the first of Lamar's career.

It knocks another track from a rapper crossing over -- Wiz Khalifa's Furious 7 weeper 'See You Again' -- out of the top spot.

Coming in third on the Billboard charts is Fetty Wap's breakout hit 'Trap Queen.'

Billboard Hot 100: #1(+52) Bad Blood, @taylorswift13 Feat. @kendricklamar [4 weeks]. *her 4th #1 single*

— Chart News (@chartnews) May 27, 2015