#1. “Gary Vaynerchuck”(@GARYVEE)

1.05 Million Followerswww.gayvaynerchuck.com

Why? - CEO of VaynerMedia, a social media brand consulting agency, video blogger, co-owner and director of operations of a wine retail store, and an author and public speaker on the subjects of social media, brand building and e-commerce.

Author of three bestsellers The Thank You Economy, CRUSH IT! Why NOW Is the Time to Cash In On Your Passion, and Jab, Jab, Jab, Right Hook: How to Tell Your Story in a Noisy World.

#2. “Peter Cashmore”(@MASHABLE)

3.82 Million Followerswww.mashable.com

Why? - In 2009, Cashmore was recognized in Inc.'s "30 Under 30", Forbes' "Top 25 Web Celebs", and The Huffington Post's "Top 10 Game Changers 2009". He writes a weekly column on technology and social media at CNN. In 2012, Cashmore made Time magazine's list of the 100 most influential people.

#3. “Mark Cuban”“”((@MCUBAN)

2.06 Million Followerswww.markcuban.com

Why? - Owner of the National Basketball Association's Dallas Mavericks, Landmark Theatres, and Magnolia Pictures, and the chairman of the HDTV cable network AXS TV. He is also a "shark" investor on the television series Shark Tank. In 2011 Cuban wrote an e-book, How to Win at the Sport of Business, in which he chronicles his life experiences in business and sports.

#4. “David Berkowitz”“” (@DBERKOWITZ)

24.2K Followerswww.marketerstudio.com

Why? - Spearheads marketing operations, directs the agency's communication strategy, and gains visibility for its clients such as Coca-Cola, Visa, and Bayer. Previously, he spent seven years at agency 360i.

He has spoken at more than 225 events around the world, including South by Southwest (SXSW) in Texas, Digital Age 2.0 in Brazil, Crowdsourcing Week in Singapore, and the keynote at Interactive Marketing Summit 2013 in Turkey.

#5. “Jake Shafer”“” (@JACKSHAFER)

42.9K Followerswww.jackshafer.com

Why? - Covers media for Reuters.com Opinion section. Prior to joining Reuters, he edited and wrote the column Press Box for Slate, an online magazine. Before his stay at Slate, Shafer edited two city weeklies, Washington City Paper and SF Weekly.

Much of Shafer's writing focuses on what he sees as a lack of precision and rigor in reporting by the mainstream media, which he says "thinks its duty is to keep you cowering in fright."