Ryan Seacrest
American Idol host; syndicated radio host

The impossibly likable "Idol" host posts entertainment news and updates on his lavish life, but the real draw is his correspondence with the A-list. Seacrest is at home welcoming Betty White to Twitter, sharing info about a pool party with Katy Perry and wishing Jennifer Lopez another "happy 29th birthday!!"

Marisol Segal
Marketing, Rdio

Segal has spent more than two decades in the industry, and a lifetime being a passionate fan. Warm and personable, she's as likely to be taking in the symphony as clubbing in the Castro. Sample tweet: "Just saw the trailer for the new Katy Perry movie. It looks like a cookie cutter of the Bieber movie, but with a less exciting story."

Nikhil Shah
Co-Founder, Mixcloud

Not content to just head up the business development end of MixCloud, an online radio platform based in London, Shah also owns his own EDM label, MakeManMusic. He uses Twitter to enthuse over music and events he's attending or spinning at-all while corresponding with MixCloud users.

Jonathan Shecter
Director of programming, Wynn Las Vegas Nightclubs

Source co-founder turned Vegas DJ shares life on the strip, as well as hip-hop memories from back in the day. His extended string of tweets after the recent passing of Ms. Melodie from Boogie Down Productions was a moving must-read.

Ben Sheffner
Copyright/anti-piracy attorney, Motion Picture Assn. of America

With the curiosity he cultivated as a journalist (and Billboard contributor), Sheffner riffs on-and links to-the latest news and developments in the world of copyright, often with a playful sense of humor. Sample tweet: "1st email forgery lesson: get the time zones right!"

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Julianne Shepherd
Contributor, SPIN, MTV Hive; Culture Editor,

The Broolynite gives us a glimpse into her musical world -- from hip-hop to Latin music -- and doesn't hold back, staying true and vocal about today's trends, controversial issues, her likes, dislikes and everyday NYC living.

J Sider
Founder/CEO, BandPage

BandPage has been adopted by half a million musicians, and now you can expect that number to rise even higher. The producer of the most popular music application on Facebook, Sider has recently announced he's taking his baby out onto the broader Web. Sider is a jet-setting entrepreneur still in his 20s, and he tweets like one.

Judy Miller Silverman
Owner, Motormouth Media

The head of the Los Angeles-based PR firm (its roster includes indie luminaries like Animal Collective, Dirty Projectors and Yeasayer) offers conversations with fellow industry folk and quirky insight into the biz. Sample tweet: "I think one [of] my bands just made it through 15+ interviews without anything going wrong. is this the last day on the mayan calendar?"

Tatiana Simonian
Head of Music, Twitter

In existence since October of last year, the @TwitterMusic account has more than 1.1 million followers. That's a testament to music's power on the social platform -- in 2011, half of the top 10 trends on Twitter were music-related -- and it's also a testament to Simonian, hired last year to handle music partnerships for the company's content and programming team.

Ben Sisario
Music-business reporter, New York Times

If you follow one music biz reporter -- who doesn't work at Billboard, of course -- Ben Sisario is a good place to start. Deeply sourced in all things major label, digital music and, increasingly, the business of electronic dance music.