Canadian singer Justin Bieber poses with a wax model of himself in 2011. Today is the star’s 21st birthday. Reuters

Pop sensation Justin Bieber turns 21 on Sunday, which means the quintessential teen star is officially a young adult. The controversial Canadian has been in the public spotlight for about seven years now, giving hundreds of interviews and providing dozens of soundbites that people love to hate.

In honor of Bieber’s 21st birthday, here are 21 of his best – and funniest – quotes, aggregated from Rolling Stone, Thought Catalog and BrainyQuote:

1. “I want my world to be fun. No parents, no rules, no nothing. Like, no one can stop me. No one can stop me.”

2. “I'm not a fighter by nature, but, if I believe in something, I stand up for it.”

3. “I make mistakes growing up. I'm not perfect; I'm not a robot.”

4. “When life knocks you down to your knees, you’re in the perfect position to pray.”

5. “I'm crazy, I'm nuts. Just the way my brain works. I'm not normal. I think differently.”

6. “It's not me trying to act or pose in a certain way. It's a lifestyle - like a suaveness or a swag, per se.”

7. “Not trying to be arrogant, but if I walked down the street and a girl saw me, she might take a look back because maybe I'm good-looking, right?”

8. “I'm really an animal guy. I express myself in different ways as an animal.”

9. “My first date has been…mythologized as ‘Bieber’s Dating Disaster.’ I took her to a buffet restaurant. Yes, I wore a white shirt. Yes, I got spaghetti.”

10. “Singers aren’t supposed to have dairy before a show, but we all know I’m a rule breaker.”

11. “Whenever I’m sick, my doctor jokes that I have Bieber Fever.”

12. “Haters are just confused admirers.”

13. “Dare to be a sucky skateboarder or a lousy video editor or a completely crappy golfer. If we do only the stuff we’re good at, we never learn anything new.”

14. “There are lots of things I really like besides girls. Like pizza. And pranking. And Chuck Norris.”

15. “Don’t try to be anybody else because that’s what makes you not swaggy.”

16. “I think it’s important to make all women feel like princesses, because every girl is a princess. I’m serious.”

17. “When people see a negative thing about me on a magazine, they're gonna buy it. Every time some site writes something bad, all my followers go on there, and it brings them more traffic.”

18. I’m telling you, people. Every day we wake up is another blessing. Follow your dreams and don’t let anyone stop you. Never say never.

19. “I don’t think of myself as powerful. If anything, my fans are powerful. It’s all in their hands.”

20. “I’ll never be an American citizen. You guys are evil. Canada’s the best country in the world.”

21. “I wear black diamonds instead of regular ones because I’m not flashy, just flossssy.”