Blake Shelton

Shelton had to post something funny about his longtime buddy.

Even the most educated fan won't know some of these.

Country music's next big thing.

The two will celebrate that anniversary this fall. Time goes quickly when you're having fun!

The No. 1 marks another major career milestone for Shelton, too ...

Oops! His reaction is PRICELESS!

What song should you be rocking out to based on the stars?

He's becoming a fashion pro ... sorta.

Even though Lambert didn't write the song, it's pretty much her exact life story -- so Shelton knew he had to let her cut it.

Sounds like he had a little accident.