R&B pin-up Rihanna upset conservative family members by showing up at a recent wedding in a dress that was too revealing. The "Umbrella" hitmaker looked stunning in the blue gown she wore to cousin Nigel Alstrom's nuptials on October 27 but fellow guests disapproved of the fact Rihanna appeared to be wearing nothing underneath it.

Side views of the singer gave prudish wedding guests a clear sight of the star's breasts.

One appalled family member says, "She should have been more low-key, dressed appropriately... She had words with her aunt and mother, and she was asked to leave."

Rihanna, 19, recently revealed she could never even wear a bikini in a video or photoshoot - because family members would be outraged.

-Rihanna Pictures

(This news article provided by World Entertainment News Network)