Happy Monday, VentureBeat readers! People may talk about the Monday blues, and I know no better way to cheer people up than with rhyming and ice cream. Enjoy your stack of funding news with whipped cream and a cherry on top.

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Square raises a stunning $200M from Starbucks, Citi Ventures, & others

Mobile payments startup Square has raised more than $200 million in its fourth round of funding from investors such as Citi Ventures, Rizvi Traverse Management, and Starbucks, the company announced Monday morning.

The round was worth more than $200 million, a spokesperson told AllThingsD. The publication also pegs Square’s valuation at $3.25 billion. Including the new round, San Francisco-based Square has raised more than $341 million in funding to date. Read more on VentureBeat.

Winklevoss twins sink $1M into social network for pro investors

Tyler and Cameron Winklevoss, the twins best known for their legal battle with Mark Zuckerberg over Facebook, are jumping back into the investment game with new funding for SumZero, reports the Wall Street Journal. SumZero is a social network for professional investors from hedge funds, mutual funds, and private-equity firms. The site was founded by Divya Narendra and Aalap Mahadevia, the Winklevoss’ fellow alumni at Harvard Connect. Read more on VentureBeat.

Bangalore-based enterprise IT startup Appnomic raises a modest $5M

Appnomic has secured its third round of funding from existing investor Norwest Venture Partners for its cloud application monitoring service. $5 million is a surprisingly modest fundraise for an enterprise tech company that has experienced moderate growth. The company is based in Bangalore but has an office in Silicon Valley. In 2009, it pulled in its first round of funding. This new round brings its total investments to $12.5 million. Read more on VentureBeat.

Duolingo, a free translation and language-learning site, picks up $15M

One of the East Coast’s most promising startups, Duolingo, has raised $15 million in second round funding from New Enterprise Associates (NEA) and existing investor Union Square Ventures just three months after its launch.The initial idea for Duolingo was to convince millions of people to translate web content into different languages for free. It will use the new infusion of capital to expand its core team of software engineers. In its previous funding round one ago year, the company received $3.3 million from high-profile angel investors, including Ashton Kutcher. Read more on VentureBeat.

Runa Capital puts $5M into Genetic Data company Station X

Station X has secured $5 million in equity financing from Runa Capital. Station X develops software that analyses and visualizes large-scale human genome information for researchers and clinicians. The technology helps turn genetic data into meaningful information. It essentially offers big data services for genetics.  This is the company’s second round of financing, and included a re-up from existing investor Genomic Health. The money will go towards rolling out a commercial version of the product.