The R&B star's hit song stayed at number one for ten weeks, but her successful chart run coincided with a summer of rain in Britain, which was jokingly referred to as the "Rihanna curse".
Rihanna has now confessed that the poor weather conditions helped to make the single such a big hit.
"I feel bad about that," Rihanna told WENN. "I don't think it's my fault. I think the weather helped to keep the song there for so long. It worked for me."