Rihanna two weeks away from tying the Beatles' chart record

Rihanna has scored a sixth week at number one in America with her hit Work.

The track's success has extended the run of bad luck for homegrown artists to a record-extending 38 weeks - that's the last time an American artist hit number one on the Billboard Hot 100.

With a total of 57 weeks at the top, Barbados-born Rihanna is two weeks shy of tying the Beatles for the second-most weeks at number one. Mariah Carey leads the way with 79 cumulative weeks.

Meanwhile, Lukas Graham's 7 Years rises to two on the new Hot 100, and Justin Bieber's Love Yourself rounds out the top three.