While other boy bands have come and gone, Backstreet Boys are for life.
After eight studio albums, 12 major tours, and 21 years of friendship, Backstreet Boys have proved to the world that they're here to stay. While we were briefly concerned when Kevin left the group in 2006, they made the comeback tour with New Kids on The Block to rule all other comeback tours.
Now they're back touring the world this summer, proving that being in your 30s and 40s doesn't mean you can't rock the boy band world. Hear that 'N Sync?
Here are 20 things even the biggest Brian lover may not know about BSB: