Boundary-pushing pop star Rihanna has just notched up another career milestone: her sixth US #1 single.
Her lyrical porn anthem "Rude Boy" has taken out the #1 spot on the Billboard Hot 100 this week, clocking up her fifth solo #1 single, and overall her sixth career #1 single.
"Rude Boy" is the third single to be taken from Rihanna's fourth studio album Rated R.
It took Rihanna only four years to reach this milestone - not bad for someone who's only just turned 22 years old.
Rihanna's previous #1 singles were "SOS" (from 2006's A Girl Like Me), "Umbrella", "Take A Bow" and "Disturbia" (all from 2007's Good Girl Gone Bad), and her 2008 collaboration with T.I. "Live Your Life".
Her collaboration with Jay-Z and Kanye West, "Run This Town" only managed a #2 peak on the Billboard Hot 100.
"Rude Boy" is currently sitting at #1 on Australia's ARIA singles chart.
Check out Rihanna and her crazy robot dancers performing "Rude Boy" live at the 2010 Echo Awards: