What you need to know this instant.

Summer Must-Haves, Designer Collaboration Mania and Other Things We're Talking About This Week

1. Gear up for summer by shopping our favorite beauty products, accessories, shoes and bags of the season.

2. Things went a little collaboration-crazy this week. There was the confirmation that Maison Martin Margiela is teaming up with H&M, Opening Ceremony x Adidas Originals released a lookbook, J.W. Anderson is going to design for Topshop, the NFL tapped Marchesa to make a tee, Kohl's announced the first of many fall partnerships will be with Narcisco Rodriguez and Creatures of the Wind's collection for J.Crew finally landed online. Our wallets feel lighter already.

3. Rock of Ages star Malin Ackerman shares her thoughts on everything from playing Debbie Harry to kissing Tom Cruise.

4. Mary-Kate and Ashley Olsen turned 26 this week. We celebrate by remembering 26 of their very best looks, starting with those matchy-matchy child star ensembles.

5. There's still plenty of time to enter C. Wonder's "Wonders of Columbus Circle" contesthere are some tips to get you started.

6. Prepare to swoon over the well-dressed fellahs from Suits. (We sure did!)

7. Our best browsing and buying advice for summer flea markets.

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