It’s hard to resist the fantasy that there’s a huge designer dance-off brewing up out there. In competition for all that is blinging, sexy, and rapper-related, Rodarte has spoken from L.A., Mr. Tom Ford has weighed in from the London corner, and Ms. Donatella Versace has done her thing in Milan. Now, in breaking news, Mr. Peter Dundas has just thrown down his hyper-sparkly, super-sporty, ultra-hot challenge at Emilio Pucci. One can only guess how Olivier Rousteing is limbering up for his Balmain counterblast in Paris. Oh, and then there’s Rihanna—the uber-idol they all want to impress. But RiRi’s a designer, too, yes? Check out her crop-topped, basketball-short-ed and tight-skirt-ed collection for River Island, and you’ll see how she’s baiting them all for a piece of the young-girl action.