Happy Friday — you know what that means, it's time to announce our CelebStyle top stars of the week! This week's standouts were Emma Roberts in a smashing black-on-black Valentino ensemble, Jessica Alba in an unparalleled street-chic look complete with a fresh Tory Burch fedora, Solange Knowles in a stunning Rachel Roy gown with a sparkling Edie Parker clutch, and a few more top trendsetters including Diane Kruger, Krysten Ritter, Chrissy Teigen, and Estella Warren. Step inside to see who was crowned a CelebStyle top star, why we loved their looks, and how you can re-create them yourself.

Whether you're planning a brunch, a movie date, or dinner with the family, mimic one of these super sweet and stylish celebrity ensembles for Mother's Day on Sunday. Re-create Jenna Dewan's '70s-inspired floral look for a day trip with Mom, channel Jennifer Lopez's sexy nude look for an evening dinner, or copy Jessica Alba's flirty-yet-edgy Tory Burch style for a rockin' concert. Step inside to see six other Mom-approved looks, then shop the pieces for yourself for Sunday's fabulous festivities.

The week kicked off with Met Gala glamour, and celebs showed no signs off slowing on their style. Aside from Monday night's ultrachic festivities, this week's premieres, parties, and fashionable fetes were occasion enough to draw out the chicest kind of celebrity dressing. We spotted Nina Dobrev bringing bold color on the perfect party dress, Ashley Madekwe working the sophisticated-cool angle in a Zara sheath, and Natalie Portman making a stunning arrival at the New York City Ballet's Spring Gala. Looking for something more casual? Eva Mendes outfitted an effortless take on Summer staples — just click on for all that and more celeb-styling inspiration in this week's top 10.

There are classic stripes, then there are sheer stripes, which celebs are all over these days. Katy Perry just attended a music dinner in Century City wearing a sheer black striped body-con maxi dress with killer studded pumps and a long beaded necklace. Kerry Washington has also gotten in on the sheer-stripes trend, albeit via a superclassy Donna Karan frock. Lauren Conrad also sported sheer stripes in a beachy way during an appearance in Las Vegas. Step inside to which other stars have rocked sheer stripes and to shop the classic-turned-badass trend for yourself.

We love looking to stylish celebs for wardrobe inspiration, and with Summer on the horizon — think beaches, rooftop parties, and days spent in the sun — we're giving you an exclusive look at what some of our top fashion stars are shopping for right now. Our first Summer stylist is So You Think You Can Dance superhost Cat Deeley, who chatted with us about her Summer fashion must haves. We've been admiring her penchant for bright colors, fun embellishments, and cool-girl accoutrements from afar, and we're so excited by her picks. Not only does she have a keen eye for covetable brands like Isabel Marant and Matthew Williamson, but we also love how Cat mixes up her style profile with affordable, high street fashion. Just click the slideshow to see, and shop, Cat Deeley's ultimate Summer shopping list right now.

This Instagram tour doesn't require an iPhone or Droid — just step right this way for our week in pictures. Among Fall previews from favorite retailers, like H&M and Target, we were also treated to some serious celebrity glamour. From Zoe Saldana's appearance at the Cosmopolitan for Latinas launch in NYC to the all-out fashion extravaganza at the Met, we're sharing our favorite moments from inside the action. Click on to get a taste of all the fashionable happenings in our world, and if you're not following us yet, what are you waiting for?

Across the pond in Paris and London, fashion insiders from all parts of the world are opting to sling their jackets over their shoulders rather than wear them fully. Why? Because it makes for a nonchalant look that elevates your chic status times 10. Everyone from Liv Tyler to Katy Perry to Carine Roitfeld and so many more celebs are embracing the Euro-style trend with blazers, jackets, and coats of all styles. But even if you don't live in Europe, or aren't even visiting soon, that doesn't mean you can't get in on the sharp trend. Step inside to see which fashion insiders have slung their jackets over their shoulders and to shop similar pieces for your next jacket-slinging effect.