From Christina Aguilera and Demi Lovato’s tight-knit friendship to Elton John and Eminem’s long-standing friendship, how well do you know these celeb besties? Try our quiz below!

1. 

Demi Lovato and Christina Aguilera collaborated on which track...?

2. 

What's Adam Levine and Blake Shelton's 'ship' name?

3. 

How many collaborations have Ed Sheeran and Taylor Swift released?

4. 

Ellie Goulding was the opening act for the North American leg of which Katy Perry tour...?

5. 

Lady Gaga collaborated with Ariana Grande on which track...?

6. 

What year did Elton John first meet Eminem?

7. 

What TV show did Adam Levine and Blake Shelton first become friends on?

 

SEE ALSO: Our Fave Celebrity Friendships