Rihanna Kicks Off TODAY Show’s Summer Concert Series… [PHOTOS + VIDEO]

Rihanna (and her Wonder Woman costume) performed live on NBC?s ?Today? show in Rockefeller Plaza this morning (May 27, 2011). [Sidebar: When did Wiz Khalifa join her background dancers?]

RihRih kicked off Today’s Summer concert series (literally) by performing ?S&M? and ?Only Girl in the World? for the hyped crowed.

In case you missed it, watch video of Rihanna’s Today Show interview & performances below:

VIDEO: Rihanna on Today Show – FULL (5/27/11)