Fashion retailer H&M has beat out heavyweights Pepsi, Starbucks and Coca-Cola to become the most-followed brand on Google+. In a testament to the network’s viability as a marketing vehicle, Google, the former number one on Google+, is now number 13. Following H&M is Samsung USA, Pepsi, Starbucks and Burberry. The rest of the top 10, compiled by Simply Measured and based on the number of “circlers” for each brand in early February, is below. The full list, which is based on Interbrand’s Top 100 Brands, is available here. Simply Measured’s report, which…