The 'Next To You' singer, who is in New York to launch his women's fragrance 'Someday', presented a list of "little known facts" about himself on the CBS latenight show.
The Top Ten facts he revealed were:
10. My new fragrance 'Someday' also makes a delicious low-calorie salad dressing
9. I served eight months in prison for siphoning gas
8. The first thing I bought when I hit it big was a four-slice toaster
7. As hard as I try, I don't know how to not be adorable
6. Justin Bieber is my secret identity. I'm really Green Lantern
5. I'm not really a big fan of [fellow guest] Kevin James
4. I begged my publicist to get me out of this
3. Last week I accidentally waited in line for two hours for my own autograph
2. My mum had to remind me [David Letterman] is not Larry King
1. It's a hair piece!
Bieber, who has been named one of the best-paid stars under 30, recently took home two prizes at the MuchMusic Video Awards in his native Canada.
The ceremony was hosted by Bieber's girlfriend Selena Gomez, who handed him the trophy for 'International Video of the Year by a Canadian', prompting him to joke: "Selena, nice to meet you, I'm Justin. You're very beautiful, maybe we can go out sometime?"
Bieber was recently confirmed to appear at the BET Awards in Los Angeles, which air live from the Shrine Auditorium on Sunday night at 8/7c.
Watch Justin Bieber and Chris Brown's music video for 'Next To You' below: