(CNN) -- Katy Perry is officially the queen of Twitter. 

The singer has reached more than 50 million followers on the social media site, making her the most followed person in the universe. 

Perry took the milestone in stride. "Oh yeah AND we grew to 50 million Katycats! Eh, regular day at the office," she tweeted (of course). 

Not that Perry doesn't have competition hot on her heels. 

Justin Bieber has about 49.4 million "beliebers" hanging on his every 140-character submission, while President Barack Obama has around 41.2 million followers. Lady Gaga has just over 41 million "little monsters." 

The video site YouTube, Taylor Swift, Britney Spears, Rihanna, Instagram, and Justin Timberlake round out the rest of the top 10 most-followed Twitter accounts. 

Perry snagged the Twitter throne from Bieber in November. He, in turn, had earlier toppled Gaga, who for two years was the most followed person. In October she told USA Today that felt felt like she had "learned how to tame that social media dragon." 

 QUESTIONS:

Q1:
1. What is the size of Katy Perry's twitter following?
2. What is the number of accounts following katy Perry on Twitter?
3. How many people follow Katy Perry on Twitter?
Q2:
1. What is the size of Justin Bieber's twitter following?
2. What is the number of accounts following Justin Bieber on Twitter?
3. How many people follow Justin Bieber on Twitter?
Q3:
1. When did Katy Perry become the most followed person on Twitter?
2. When did Katy Perry become the person with the most Twitter followers?
3. When was Katy Perry crowned most followed person on Twitter?
Q4:
1. Who was the most followed person on Twitter prior to Justin Bieber?
2. Before Justin Bieber who had the most followers on Twitter?
3. What celebrity had the largest Twitter following prior to Justin Bieber?
Q5:
1. What did Lady Gaga say about her experience on Twitter?
2. What did Lady Gaga say about being followed by so many people on Twitter?
3. What was Lady Gaga's comment regarding her Twitter following?
Q6:
1. What's the nickname for Katy Perry's fans?
2. What are fans of Katy Perry called?
3. What name has Katy Perry given her fans?
Q7:
1. What's the nickname for Justin Bieber's fans?
2. What are fans of Justin Bieber called?
3. What name has Justin Bieber given his fans?
Q8:
1. How many characters long can a tweet possibly be?
2. What is the maximum number of characters for a tweet?
3. What is the maximum character length of a tweet?
Q9:
1. Who is in the top ten twitter accounts besides Katy Perry lady Gaga and Justin Bieber?
2. In addition to Katy Perry Lady Gaga and Justin Bieber, who else has the most followed Twitter accounts?
3. Who are the biggest Twitter accounts after Lady Gaga Katy Perry and Justin Bieber?
Q10:
1. Are all Twitter accounts associated with a person?
2. Do Twitter accounts only represent humans?
3. Are all accounts on Twitter for people?
Q11:
1. What's the nickname for Lady Gaga's fans?
2. What are fans of Lady Gaga called?
3. What name has Lady Gaga given her fans?
Q12:
1. Does the twitter top 10 have any presidents in it?
2. Are any presidents represented in the most followed twitter accounts?
3. Do presidents count among the most followed accounts on twitter?
