Billionaires in the making
These days everybody's talking about this youngest self-made billionaire. But check out some of the talented folks who are hot on his heels.

Jay-Z
Part owner of this NBA team, he's got a clothing line and is co-founder of a record company. Add his superstar wife, and they are one of the top-earning couples around. It won't be long before he adds "billionaire" to his list of accomplishments.

Mark Pincus
Never heard of Zynga? If you're on the top social networking site, you definitely know the company's games, which include "Mafia Wars" and an über-popular game. CEO Mark Pincus attended an Ivy League institution and is on his way to achieving billionaire status.

Michael Jordan
This retired basketball player is an example of how being a brand can be extremely lucrative. How much does he make per year in endorsements alone? The baller legend is also a majority owner of this league team and this motorcycling club.

Jerry Bruckheimer
Even if you haven't heard of this film and TV producer, you've likely seen his work, including this popular crime series. What were his annual reported earnings in 2007 when he was the 10th-highest money earner?

Eric Lefkofsky
This entrepreneur and professor began his career selling carpet at this school. A high-profile business magazine named him one of 2011's new billionaires. He co-founded a company that has been called the fastest-growing company in history.

William Ackman
This major investor, founder and CEO of this hedge fund once owned 10 percent of the corporation that runs a big box store. He's held significant portions of a major bookseller and was angling to buy out another.

Sean Parker
The co-founder and first president of this social networking site, he was portrayed by a famous singer-actor in an Oscar-nominated movie. At age 16 he was arrested for this.

Dennis Gillings
Chairman and CEO of this pharmaceutical services company, Gillings also has been involved in biotech and was a longtime professor at this university.

Tiger Woods
Despite his well-publicized behavior, this golf legend is likely to be the first billionaire athlete, thanks in part to his endorsements.

Craig Newmark
The Internet entrepreneur founded a classifieds website that almost killed off daily newspapers.

James Cameron
This film director, screenwriter and inventor, a native of this country, is best known for a historic blockbuster film and the highest-grossing movie to date.

Tyler Perry
This actor and director released his first film in 1995 and had a hit with a TV comedy. He has a new star-studded film in the works.

Reid Hoffman
An entrepreneur and former computer executive, the founder of a business-oriented social networking site did his undergrad work at an Ivy League university. He earned his master's in philosophy from another prestigious university.

Jerry Seinfeld
His semiautobiographical TV show was one of the most successful sitcoms in the history of American television.

Ray R. Irani
The chairman and CEO of an oil company had a life sciences building named after him at this school.
Source:Specials

The biggest athlete in professional sports is also the biggest athlete on Twitter.

NBA star Shaquille O'Neal has the most followers of any athlete on the social media site, with over 3.5 million users reading his tweets. Brazilian soccer star Kaka is second on the list, more than 500,000 followers behind.

Though athletic success is a good yardstick in determining which men and women have the most followers, it's not as reliable an indicator as you'd think. For instance, Tiger Woods isn't in the top 10 but Chad Ochocinco is. (Tiger actually has fewer followers than fellow golfers Stewart Cink and Ian Poulter.) LeBron James cracks the list but comes in behind Reggie Bush. And of all the baseball players with accounts, one-time All-Star Nick Swisher is the most popular. (It doesn't hurt that he's on the New York Yankees.)

Here's the list of the top-10 athletes on Twitter, along with a sample tweet and a summary of their favorite subjects:

1. Shaquille O'Neal -- @THE_REAL_SHAQ -- 3,564,335 followers -- 51 tweets (in the month of February)
2. Kaka -- @kaka -- 2,934,112 followers -- 57 tweets
3. Serena Williams -- @serenawilliams -- 1,931,286 followers -- 412 tweets
4. Cristiano Ronaldo -- @Cristiano -- 1,914,172 followers -- 88 tweets
5. Dwight Howard -- @DwightHoward -- 1,874,255 followers -- 22 tweets
6. Paul Pierce -- @paulpierce34 -- 1,745,039 followers -- 69 tweets
7. Chad Ochocinco -- @ochocinco -- 1,741,178 followers -- 630 tweets
8. Reggie Bush -- @reggie_bush -- 1,555,080 followers -- 61 tweets
9. LeBron James -- @kingjames -- 1,492,952 followers -- 46 tweets
10. Nick Swisher -- @nickswisher -- 1,273,939 followers -- 64 tweets
Read More: sports.yahoo