Nicole Kidman fell for Chanel 's matching sets long before Matthieu Blazy mania set in last summer. Now, they're practically her front-row uniform at the new creative director's fashion shows . On April 27, Kidman offset the mermaidian glamour of Blazy's debut Cruise collection with one of Chanel 's most wearable two-pieces. Kidman was all smiles outside the Biarritz venue, and not just because she got to see the runway show before the rest of the world. I'd be beaming too if I could wear a cozy sweater set to one of fashion's buzziest runways. Stylist Jason Bolden likely helped Kidman select the taupe turtleneck and matching pencil skirt, which hasn't appeared on a Chanel catwalk yet. The initial knit couldn't have been comfier: Its sleeves and funnel-neck seemed slightly oversize, while the fitted bodice ensured she wasn't drowning in wool. The long-sleeve was so simple, you might question if it's truly Chanel. But check out the cascading yellow gold buttons on Kidman's shoulder.…