Google 2013 Mash-up Video Goes Viral: Year's Top 10 Searches

(Photo: Rolling Stone magazine Facebook)Rolling Stone magazine cover of Boston marathon bombing suspect Dzhokhar Tsarnaev posted on July 2013.

During this year's Boston Marathon, Chechen Islamist brothers set off two bombs, killing three spectators and wounding more than 200. One of them – Dzhokhar Tsarnaev – then made the cover of Rolling Stone magazine.

7. "Royal Baby"

(Photo: The British Monarchy)The Duke and Duchess of Cambridge, Prince William and Kate Middleton, leave the Lindo Wing of St Mary's Hospital in London with their newborn son, George Alexander Louis, on Tuesday, July 23, 2013, in this photo provided to members of the media by The British Monarchy.

Kate Middleton, wife of Prince William of England, gave birth to a baby boy in July of this year. The "royal baby" garnered a great deal of attention, as Prince George is third in line to the throne of Great Britain.

8. "Samsung Galaxy S4"

Picture: SamsungSamsung Galaxy S4 Active

This new smartphone was released in April this year and includes new features such as the ability to detect a finger hovered over the screen, and eye tracking functionality. It became the fastest selling smartphone in Samsung's history, with 20 million units sold worldwide in 2 months.

9. "PlayStation 4"

(Photo: Reuters/Brendan McDermid)Andrew House, president and Group CEO of Sony Computer Entertainment, speaks during the unveiling of the PlayStation 4 launch event in New York, February 20, 2013.

Launched on November 15, this new video game console from Sony competed with Nintendo's Wii U and Microsoft's Xbox One, the eight generation of game consoles.

10. "North Korea"

(Photo: Reuters/KCNA)North Korean leader Kim Jong-un presides over an urgent operation meeting on the Korean People's Army Strategic Rocket Force's performance of duty for firepower strike at the Supreme Command in Pyongyang, March 29, 2013. The sign on the left reads, "Strategic force's plan to hit the mainland of the U.S."

In 2013, tensions between North Korea and South Korea, the United States, and Japan, escalated following threats of imminent nuclear attacks against these countries, under new leader Kim Jong-un.