Shia LaBeouf knows who Rory Emerald is! So, who in the Jonas Brothers is Rihanna & Sabrina, the Teenage Witch?

This question confuses me, but if you are asking who Rihanna and Sabrina the Teenage Witch are then... Rihanna is a musician, she sings Umbrella if that helps. Sabrina the Teenage Witch was a T.V. show and later cartoon about a witch who lived with her aunts in the mortal world. Does this by chance have anything to do with the Jonas Brothers live chat? if not just totally ignore I said that, but I was just wondering because they mention both Rihanna and Sabrina in it and you said "who in the Jonas Brothers" so I ume your a fan. Any way, if this makes zero sense, I'm sorry, pretend I never said it!