CELEBSTYLE'S TOP FOUR LOOKS OF THE WEEK

From Kate Bosworth in Vanessa Bruno to Heidi Klum in Ever, our top four looks of this week make dressing well seem so easy. Take a few hints from our favorites by shopping the looks

Kate BosworthKate attended the Vanessa Bruno dinner in LA wearing an all-red ensemble, courtesy of the designer herself. Get it all now.

Check out Alexa Chung looking effortlessly stylish at the Mulberry pool party here.

Rebecca RomijnGet Rebecca Romijn's exact Torn skirt and Sigerson Morrison sandals now!

Heidi KlumHeidi Klum ran around NYC in a casual, cool Ever tunic and jean shorts

There were plenty of great looks to choose from this week. Our favorites — from Rachel Bilson in clogs to Olivia Palermo in Michalsky — exude style and that certain je ne sais quoi. Check them out now.

Rachel BilsonGet Bilson's adorable all-black ensemble here.

Olivia PalermoOlivia Palermo accessorized with perfection in Berlin. Get her exact items here.

Blake LivelyCheck out Blake Lively looking good on set in DVF and Pierre Hardy now.

Whether in Paris like Blake, London like Victoria, or LA like Kate and Reese, these celebs have got Summer dressing down. This week we saw a mix of preppy, sweet, and flat-out cool. Check out four of our favorites here.

Reese WitherspoonLouboutins, Lanvin, and a fedora made for a great Reese look. Check it out now.

From the girls at Glastonbury to the ladies at launches, each one of our top four looks this week is about embracing the warm weather. We saw jean cutoffs, white dresses, flirty rompers, and everything Summery and fabulous in between. Check out some of our favorites now.

Sienna MillerSienna vypadalo cool a hudební festival, vhodné ve své pojistky a Fedora v Glastonbury v letošním roce. Viz její vzhled zde .

Emma WatsonMiss Watson jumped on the jean-shorts bandwagon at Glastonbury and looked as cute as ever. Check it out here.

Katharine McPheeMcPhee kept cool in her Joie romper at a launch in Vegas. Get the same one now!

Summer has officially arrived this week, and outfits reflected the seasonal transition. We saw everything from jeans to minidresses, and we loved it all. Here are some of our favorites.