Here next single is rumored to be released in June/July and its called "Shut Up and Drive" its suppose to be better than Umbrella.
Quote from someone from ukmix.org
Even though she was only two when the Eighties ended, Barbadian pop princess Rihanna is steadfastly devoted to the decade: She hit Number One last year with the “Tainted Loveâ€-cribbing “SOS,†and her new disc’s standout track, “Shut Up and Drive,†features the bass line from New Order’s “Blue Monday.†“It’s edgier,†Rihanna says about her new album during a break from recording a track with Timbaland and Justin Timberlake. “Umbrella,†with Jay-Z, is a midtempo ballad, and “Breakin’ Dishes†expresses the dinnerware-smashing fury of a woman scorned. “I know ladies can relate to that song,†she says.