'Nightline:' Acai Berries, a Kinky Commander and Celebrity Sex Tapes

Dec. 23, 2010— -- "Nightline" crisscrossed the globe to report on the year's biggest breaking news events, the hottest trends, the most scathing celebrity scandals and more. Here's a look back at our most popular stories of 2010 on ABCNews.com.

Confusion Over Acai Does Not Mute Market

Acai berries are the so-called "miracle" super food from the Amazon. In March, "Nightline" reported on how differently this fruit was marketed in Brazil than in the United States.

In its native country, Acai are mashed into a pulpy drink full of antioxidants. Farmers nicknamed the popular drink "purple gold." In the U.S., the fruit is sometimes sold in pill form and was promoted as a weight loss supplement in a series of Internet scams.

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Kinky Commander's Double Life

Former Canadian Air Force pilot Russell Williams was sentenced to two concurrent life sentences in October for the murder of two women.

During the trial, prosecutors exposed the dark side of the former commander, revealing a history of twisted sexual fetishes. "Nightline" reported on how Williams broke into young women's homes, stole their underwear, and often photographed himself in the women's panties.

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Jesse James: I Took an 'Amazing Life and Marriage and Threw It Away'

After his divorce from actress Sandra Bullock, Jesse James spoke publicly for the first time in an exclusive "Nightline" interview in May about how he cheated on his Oscar-winning wife and shattered their relationship.

I "took a pretty amazing life and amazing success and marriage ... and threw it away by my own hands," James told ABC News' Vicki Mabrey.

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Angelina Jolie: Rebelled Because of Mom?

A new book drew enormous attention when it was released this summer because it claimed to be full of tantalizing secrets about the world-famous actress.

Andrew Morton, author of "Angelina: An Unauthorized Biography," claimed in his book that the actress' late mother, Marcheline Bertrand, caused Jolie's rebellious behavior in her younger years.

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Heidi Montag After Surgery: 'I Wanted to Die'

Months after her marathon plastic surgeries, reality TV star Heidi Montag sat down with ABC News' Juju Chang in January to discuss her shocking transformation and how much pain the surgeries had put her through.

Montag had 10 procedures done, including breast implants, a brow lift, a nose job revision, Botox injections, fat injections in her cheeks and a chin reduction. She had neck liposuction and had her ears pinned back.

At the time, Montag flatly denied she was addicted to plastic surgery, but changed her story in a November interview with ABC News' Cynthia McFadden.

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Floyd Landis on Lance Armstrong Exclusive

After years of denial, cyclist Floyd Landis admitted to using performance-enhancing drugs and claimed his former teammate, Lance Armstrong, also was doping during races.

In an exclusive "Nightline" interview in July, Landis said, "If I'm taking on Lance Armstrong, then that should be evidence enough that there's a problem with the system, because I'm saying it -- a bunch of people did it,"

Armstrong's attorney, Tim Herman, adamantly denied Landis' allegations. He went on to say that Armstrong has undergone around 300 separate competition drug tests and never tested positive.

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An Inside Look at the Celebrity Sex Tape Industry

ABC News' Neal Karlinsky reported on the millions of dollars celebrity sex tapes generate for their distributors and whether these tapes create an embarrassing crisis for Hollywood starlets, or if they catapult their careers.

Former playmate Kendra Wilkinson, socialite Paris Hilton and reality TV star Kim Kardashian are a few stars who have had their sex tapes released without their permission. Hilton's sex tape, "One Night in Paris," has reportedly generated about $20 million alone.

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Terry Jones: Burning Korans 'Meant to be a Warning'

Pastor Terry Jones ignited an enormous controversy and international media frenzy when he declared Sept. 11, 2010 as "International Burn a Koran Day."

He threatened to mark the anniversary by burning hundreds of the holy books at his church in Gainesville, Fla. Heads of state and religion, from the Vatican to Gen. David Petraeus, urged Jones not to go through with it.

Jones sat down with ABC News' Terry Moran at his church on Sept. 7, and said he wanted to burn the Koran as "a warning to the radical element." On Sept. 9, Jones canceled the Koran burning after he claimed the proponents of the "Ground Zero Mosque" -- an Islamic cultural center planned a few blocks from the site of New York's World Trade Center -- had agreed to move it to a different site.

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Atheists Break Out New Ritual Tool: The Blow-Dryer

At the annual American Atheists Convention in July, one of atheism's premier provocateurs, Edwin Kagin, faced the crowd wielding a blow-dryer to conduct a mass "de-baptism" of his fellow non-believers.

Kagin said the heat from the blow-dryer symbolically dried up the offending waters that were sprinkled on the followers' foreheads as young children during baptism.

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