Teen pop megastar Justin Bieber has set Twitter ablaze with a message suggesting he may be stepping away from the stage -- just as his new movie hits theaters on Christmas Day.

"My beloved beliebers I'm officially retiring," the 19-year-old Bieber said on Twitter to his nearly 48 million followers.

At the bottom of a dank salt mine in Colombia, a 200-strong film crew featuring Spanish actor Antonio Banderas is reconstructing the incredible tale of 33 miners buried alive for 69 days in Chile in 2010.

Actors from multiple countries work in suffocating heat on "The 33," which traces the unlikely survival of the men trapped deep underground after a collapse at the San Jose copper mine in the Atacama desert.

Syrian artists have turned to black humor to depict the brutal war devastating their country as they marked on Wednesday the third Christmas since the deadly conflict erupted.

Their works posted on the Internet reflect the tragedy that has struck Syria where violence has reportedly killed more than 126,000 people and forced millions to flee.

Dubai has promised to celebrate New Year's Eve with a record-breaking extravaganza featuring over 400,000 fireworks, the largest display the world has ever seen, its government said.

The United Arab Emirates city state, home to the world's tallest tower, largest man-made island and one of the world's busiest airports, will "break the Guinness World Record for the 'Largest Firework Display'," a government statement said.

Already in the swing of parenting, Roger Federer is getting ready for a larger family.

The tennis star says on Twitter that he and his wife, Mirka, are expecting another child next year.

For his second film as director, British actor Ralph Fiennes lifts the cover on a little-known secret about classic English author Charles Dickens: his decade-long adulterous affair with a young actress.

Fiennes, a Shakespearean actor who made his debut behind the camera with 2011's "Coriolanus," used a 1990 biography as the basis for "The Invisible Woman," on limited release from Wednesday in the United States.

A year ago, Miley Cyrus was no stranger to us, of course. But who could have guessed how her star would rise — or rather, explode — in 2013, making this former preteen idol one of the most watched people on the planet? And so it seems only right to make Miley our tour guide (Kim and Kanye, you came close!) as we take our annual, highly selective, chronological tour through the year's pop culture moments:

JANUARY

Ben Stiller's commonality with the hero of his new film hasn't gone unnoticed.

"The Secret Life of Walter Mitty," starring and directed by Stiller, is adapted from James Thurber's classic short story that first appeared in The New Yorker in 1939. Since then, Walter Mitty (a mild-mannered man who enlivens a mundane day with a series of fantasies) has been synonymous with daydreaming and flights of imagination.

"Anything goes" was the guiding ethos for Martin Scorsese and Leonardo DiCaprio in making their extravagant dark comedy of Wall Street excess, "The Wolf of Wall Street."

"We would look at each other and ask, 'Are we going too far?'" says DiCaprio. Rarely was the answer "yes."

Universal Pictures has delayed the release of "Fast & Furious 7" for almost a year following the death of star Paul Walker.

The studio announced Monday that the "Fast & Furious" sequel will be released in April 2015, instead of July. Shooting on the film was about halfway finished when the 40-year-old Walker died in a car crash outside of Los Angeles.