Another season, another Fashion Week … and yet another opportunity for brands to engage with fans. This week, we take a look at how brands were winning social, both on and off the runway.

1. New York Fashion Week saw 20.8M+ engagements.

Another Fashion Week has come and gone. Only this time, posts and engagement on Instagram nearly doubled. Can you guess which images and hashtags stole the show? See the stats.

2. Pinterest seeks $11 billion valuation with new funding.

“Shake Shack isn’t the largest fast food company in the country, but if the high-end hamburger chain’s social media presence is any indication of its potential, it might very well have the brightest future.”

3. What makes images go viral on Pinterest?

After analyzing more than 1 million pins, PLoS ONE has arrived at some interesting conclusions about what makes a pin go viral. As it turns out, the secret is something very basic.

4. 47 million U.S. users will log into Pinterest at least once a month this year.

“Pinterest is poised to become Madison Avenue’s newest darling, and this year will be a critical period to see if the website can turn the initial hype into a serious advertising business. … The digital-image bookmarking site stands out from its social peers because its users show up to the site raising their hand and saying, ‘I’m in the market to buy something.’”

5. How marketers can leverage Instagram and other visual sites.

To better understand how to tap into the potential of Instagram, Forbes caught up with Apu Gupta, co-founder of Curalate. He shared top social media mistakes to avoid and how brands can measure the efficacy of their efforts.

6. Pinterest is planning a new, multi-image ad carousel.

“Pinterest’s monetization push is hitting full throttle: The scrapbooking site is developing a new ad, a “multi-pin carousel” that will allow marketers to place several images in a single promoted pin, according to ad agency executives briefed on the company’s plans. Although Pinterest is actively pitching the ad to agencies, it’s unclear when the ad will hit the market, the execs said.”

7. Travel brands are looking to Instagram for the influencer bump in 2015.

“Many travel brands are embracing the promise of Instagram influencers and what they have to offer. More viral than bloggers and more immediate, this new breed of travel sharer promises to hit all the marks social media managers need: millennials, smartphones, in-market, visual, and, hopefully, viral.”

8. Bob Vila sees 20% lift in website visits from male Pinterest users.

Pinterest’s efforts to attract more men are paying off for brands like DIY home improvement company, Bob Vila. For Bob Vila, men now represent 15% of total site traffic from Pinterest, a number that is growing at a rate of 20% per month.