Is Rihanna Teaming Up With Stella McCartney?

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Designing women: Stella McCartney and Rihanna earlier this year.

Giorgio Armani isn't the only fashion designer smitten with Rihanna.

The pop star—who just announced plans to design her own clothing line for British retailer River Island—is said to be the new muse for designer Stella McCartney, with rumors swirling that the two ladies will collaborate on a fashion range, the Daily Mail reports.

"They have been having regular chats," a source tells the British paper. "They call them 'mood calls.' Stella rings Rihanna and asks her to explain what has influenced her mood that day—colors, textures, patterns. Stella feels she needs to tap into a younger generation and Rihanna is happy to help. It’s a bizarre way to create a fashion line but they work well together."

Hmm. Is a sexier Stella collection in the pipeline? Only time will tell.