Rihanna's S.O.S.

(April 6, 1:00PM ET) -- She skyrocketed to the top of the charts with the hit, 'Pon De Replay.' Now, super-sexy pop singer Rihanna is doing it big with her new single, 'S.O.S.'

The Barbados bombshell sat down with the TV show 'EXTRA' to explain how it all started.

Check local listings for when 'EXTRA' airs.