Rihanna was in the Windy City over the weekend for the Kanye West concert she opened for and brought along and her “good friend” Chris Brown.

Saturday night after the concert the pair let loose and partied at hot spot Stone Lotus nightclub where an inside source told us, “They are definitely a couple.” However, tension was running high between the two.

“Rihanna was mad that Chris kept bringing other girls into the VIP area,” the source said. The Boots Girls observed the couple as they spent most of the night partying and dancing on opposite sides of the VIP area. Rihanna went to the deejay booth to request a song while boyfriend Chris danced in the corner checking out a mystery blonde. Credit : The Boots Girls.

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