Rihanna shows off her long legs in a slit dress while attending theRihanna for River Island Collection Launch at the Oxford Street River Island store on Monday (March 4) in London, England.

Earlier in the day, the 25-year-old entertainer was spotted donning a white jacket while heading to the launch.

PHOTOS: Check out the latest pics of Rihanna

The night before, Rihanna rocked awhite ensemble while arriving at LAX Airport for a departing flight.

Check out a newly released video below of Ri rehearsing for her upcoming Diamonds World Tour, which is set to kick off on Friday (March 8) in New York!