Lady Gaga, 25 years old, recently dethroned Oprah off the top of Forbes magazine‘s Most Powerful Celebrities list and now the pop star, with $90 million, has booted Beyoncé off the top spot on the annual Best-Paid Celebrities-Under-30 list.

In second, teen heartthrob singer Justin Bieber debuted on the strike-it-rich-quick list: the 17-year-old raked in $53 million.

Miami Heat basketball star LeBron James, 26, came in third with $48 million, though his team lost the NBA Finals on June 12 to the Dallas Mavericks.

Forbes magazine, known for its lists, including The World’s Billionaires, Most Powerful Women, Top Earning Dead Celebrities, and Best Countries for Business, has selected this year’s list of the Most Powerful People in the World.

The top ten from the list are primarily heads of state, major religious figures and entrepreneurs, which is indicative of the full list of 68 people.

Hurun Research Institute has released the Hurun Rich List 2010, the twelfth annual ranking of the richest individuals in China.

The list names 1,363 individuals with a personal wealth of 1 billion yuan (US$150 million), up from 1,000 last year and just 24 a decade ago.

China – the world’s second largest economy – has the fastest growing wealthy population in the world, according to a report by Merrill Lynch and Capgemini.

65-year old Zong Qinghou of Wahaha is the richest man in China with a personal fortune of US$12 billion.

Forbes has unveiled a list of highest-paid tennis players in the world. Half of the top 10 are men and the half women.

Roger Federer tops the list with whole year’s income of 43 million U.S. dollars while Russia’s Maria Sharapova follows him with earning of 24.5 million U.S. dollars.

The rankings are based on players’ prize money, endorsements, exhibitions and appearance fees over the past 12 months without taxes or agent’s fees deducted.

For the second year, Shia LaBeouf, star of the Transformers series, ranks number one on Forbes magazine‘s list of Hollywood’s “Best Actors For The Buck.”

The actors in this annual listing are considered a good investment at the box office for film studios. For each $1 the studio spent on LaBeouf for a film, it received an average of $81 in profits.

The actor has also starred in Indiana Jones and the Kingdom of the Crystal Skull and the upcoming Wall Street: Money Never Sleeps.

Forbes keeps on releasing top paid personalities. This time around it issued the top ten highest paid authors for the year.

On the top of the list is James Patterson, the thriller novel writer is runaway winner earning 70 million dollars. Nine out of his many works have already been adapted either in television or film.

The prolific thriller writer’s latest deal, signed last fall, involves penning a carpal tunnel-risking 17 books by the end of 2012 for an estimated $100 million.