Vampire Weekend played The Hollywood Bowl in Los Angeles, California last night (10/2) ... so being in LA - you know there were bound to be some celebs in attendance ... 

 

Word is that Jean-Ralphio Saperstein aka Ben Schwartz was in attendance - makes sense since he co starred in  Parks and Recreation with Rashida Jones - the mother of Vampire Weekend's Ezra Koenig's son 

 

But the band had an onstage surprise - bringing out all three members of Haim to sing on their hit - This Life  

 

Check it out below: 

 

This Life - Vampire Weekend w/ Haim @ Hollywood Bowl, Los Angeles, CA 10-2-19