You can hear this pop star roar on Twitter as the most-followed celebrity for 2016 with 94.5 million followers.
Who is Katy Perry?
100
This term refers to Britain's referendum vote to leave the European Union.
What is Brexit?
100
The Red Cross said that this year's flood in this southeastern US state was the worst disaster since Hurricane Sandy in 2012.
What is Louisiana?
100
Ellen Degeneres starred in this sequel which became the highest grossing animated film opening of all time in North America.
What is Finding Dory?
100
This Canadian's star held the number 1 spot for 15 weeks over the summer with the hit song One Dance.
Who is Drake?
200
The seventh most popular topic on Twitter for 2016 started with this hashtag in 2012 after the death of Trayvon Martin.
What is Black Lives Matter?
200
The World Health Organization declared this virus a global public health emergency.
What is Zika?
200
The Caribbean and the Southeastern US were hit hard by this hurricane which became the first Category 5 since Hurricane Felix in 2007.
What is Hurricane Matthew?
200
This 2016 Walt Disney animated film of a world populated by animals became the 3rd highest grossing film of 2016, and the 25th highest grossing film of all time.
What is Zootopia?
200
This singer worked her way up to the Number 7 position with a catchy song that we can't understand.
Who is Rihanna?
300
Twitter users shared this type of humorous image to portray Joe Biden's imaginary ploys to prank Donald Trump.
What is a meme?
300
This President was impeached after her opponents charged her with cooking the books in 2014 to hide Brazil's growing fiscal deficits and ensure her reelection.
Who is Dilma Rousseff?
300
This US state was blazed by a summer wildfire. More than 500,000 acres of land have been burned by almost 7,000 fires as of December 2016.
What is California?
300
In this animated series, well-known DC heroes attend high school and deal with all the awkwardness of growing up.
What is DC Super Hero Girls?
300
Most people agree that Canada should feel sorry for unleashing this guy upon the world.
Who is Justin Bieber?
400
After his Academy Award win for the "The Revenant," this actor set a new Twitter record for the Oscars, with more than 440,000 retweets per minute.
Who is Leonardo DiCaprio?
400
This country conducted its fifth nuclear test since 2006, producing an explosive yield of 10 kilotons, the highest recorded so far.
What is North Korea?
400
It was called the "Storm of the Century" and the most powerful snowstorm to hit the Northeast in 60 years.
What is Winter Storm Jonas?
400
Winner of the 2016 Kid's Choice Award Favorite Cartoon, this TV animated show was a favorite of the First Family in 2007. Its main character loves his job as a fry cook at the Krusty Krab.
What is Spongebob Squarepants?
400
Fans can't stop their feelings for this American singer, songwriter, actor and record producer.
Who is Justin Timberlake?
500
The most popular tweet of 2016 came from this Spanish YouTube star and gamer, whose "limonada" tweet was shared more than 1.38 million times after he promised prizes to fans who retweeted it.