'Get Lucky' singer Pharrell Williams has signed up to appear on Rihanna's new Style Network show, 'Styled To Rock'.

The star already has 4 of his own clothing lines, namely Billionaire Boys Club, Billionaire Girls Club, Bee Line, ICECREAM, and will now join as a mentor on the show, which features 12 contestants who will take on challenges over 10 weeks for the chance to win the opportunity to design outfits for celebrities.

Salaam Coleman Smith, president of Style Media, spoke about the addition to the panel in an official statement: "We are delighted to have Pharrell, who is a driving force in both the music industry and fashion world, serve as a mentor on Styled To Rock."

"Pharrell's unique aesthetic and commitment to individuality combined with Rihanna's vision for this series will enable our aspiring designers to hone their craft and learn from the very people who set the trends."

Meanwhile, Rihanna's summer collection for River Island will hit stores next week (May 15) and she explained that it was inspired by the style of her own team: "I made a piece for everybody in my crew, we all have different body types and different tastes - some are braver than others. I think like that because that's how women in the world are. We're all different, we like different things, we have different occasions and different moods."

Watch a trailer for Rihanna's 'Styled To Rock' below: