Question 2 of 21

Despite making millions from decades of touring with U2, his investment in this company was what made Bono the richest musician on the planet.

... Already wealthy thanks to his music career, Bono stands to pick up an extra billion dollars in 2012 thanks to his early investment in Facebook.

Question 3 of 21

Which of the following has helped Michael Jackson maintain his status as one of the highest-earning deceased celebrities?

... Michael Jackson topped Forbes' list of top-earning dead celebrities in 2011, and his estate has continued to bring many profits, in part thanks to "Michael Jackson: The Immortal World Tour" -- a Cirque du Soleil show based on his life and music.

Question 4 of 21

Who did Time name richest celebrity couple in 2011?

... New England Patriots quarterback Tom Brady and supermodel Gisele Bundchen earned $76 million from May 2010 to May 2011, making them the richest celebrity couple in the United States.

Question 5 of 21

Who was the top-earning athlete in the world from May 2010 to May 2011?

... Tiger Woods was still the highest-paid athlete in the world in 2011, with more than $75 million in income, after almost a decade in the top-earning spot.

Question 6 of 21

Which TV star turned down an offer of $5 million per episode to film just one more season of his hit comedy?

... Jerry Seinfeld, who had an estimated net worth of $800 million in 2010, decided to end the "Seinfeld" TV series on a high note, turning down $5 million per episode to extend the series by one year.

Question 7 of 21

Which British celebrity was a dollar-billionaire in 2011 but not in 2012?

... J.K. Rowling became one of the world's youngest self-made billionaires thanks to her "Harry Potter" book series and the ensuing profits from film adaptations. She dropped out of the dollar-billionaire club in 2012, thanks to her $160 million in charitable donations and an extremely high tax bill

Question 8 of 21

Known for jumping on Oprah Winfrey's couch in 2005, Tom Cruise took home more than $80 million the next year for his role in this film.

... Despite his off-screen antics, Tom Cruise remains one of the highest-paid actors in the world. His role as Ethan Hunt, the hero of the "Mission: Impossible" franchise, has helped him keep this title.

Question 9 of 21

Which celebrity earned $95 million in 2011, including a $15 million paycheck for his role as a judge on America's Got Talent?

... Thanks to his work on the radio and TV-hosting roles, shock jock Howard Stern earns almost $95 million a year.

Question 10 of 21

What author's best-selling Alex Cross series nets him nearly $100 million per year?

... Thanks to his best-selling book series and the many TV and movie adaptations of his stories, James Patterson enjoys an income of close to $100 million per year.

Question 11 of 21

Who's the youngest billionaire in the world as of May 2012?

... Just eight days younger than Mark Zuckerberg, Facebook co-founder Dustin Moskovitz is the world's youngest billionaire.

Question 12 of 21

Which of these directors helped to found DreamWorks Studios, which released Shrek (2001), Kung Fu Panda (2008) and other animated hits?

... Films like "E.T." (1982) and "Jaws" (1975), as well as his role at DreamWorks, have helped Steven Spielberg build a fortune in excess of $3 billion.

Question 13 of 21

Which TV talk show helped launch the career of Dr. Phil McGraw, who earns around $80 million per year for his self-help shows and books?

... "The Oprah Winfrey Show" helped make Dr. Phil a household name.

Question 14 of 21

Despite being kicked off the show Romper Room at age 5 for his bad behavior, this star went on to become the highest-earning actor of 2011.

... As a child, DiCaprio couldn't cut it on "Romper Room," but that didn't stop him from earning more than $75 million for his film work in 2011.

Question 15 of 21

What British musician spent 2011 adjusting to life with a newborn son, yet still managed to earn more than $100 million from touring?

... In December 2010, Elton John and his partner welcomed son Zachary via surrogate. Over the next year, Elton John also managed to earn more than $100 million from touring.

Question 16 of 21

This director helmed both Titanic (1997) and Avatar (2009) -- the two top-grossing films in history as of May 2012.

... Though his two big money-makers may one day be dethroned, James Cameron remains one of the highest-paid players in Hollywood.

Question 17 of 21

How many years did The Oprah Winfrey Show run?

... Oprah's talk show ran for 25 years, helping Winfrey build a fortune of around $2.7 billion.

Question 18 of 21

What world-famous musician got his start at the age of 15 when he joined a group called The Quarrymen?

... After the Quarrymen, Paul McCartney went on to amass a $1 billion fortune with The Beatles, Wings and a successful solo career.

Question 19 of 21

What director turned down a salary in favor of merchandising and licensing rights -- a move which helped him build a $3 billion fortune over the next several decades?

... George Lucas opted for merchandising rights to "Star Wars" rather than a standard salary, a move which paid off significantly over time.

Question 20 of 21

Who did Forbes name as the world's richest hip-hop star in 2012?

... Thanks to clothing lines, liquor sales, a record label and musical performance, Diddy's net worth is estimated at $550 million.

Question 21 of 21

What one-time American Idol judge earned more than $90 million in 2011, largely thanks to production roles?

... Simon Cowell earned more than $90 million in 2011 for his work on talent shows like "The X Factor" and "Britain's Got Talent."

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