Rodrigo's tank featured a cute shout-out to Stefani's band. Olivia Rodrigo was the ultimate No Doubt fangirl while making a surprise appearance during the rock band’s set at Coachella.

That's the beauty of this wet-look hairstyle for your next music festival ... and even a couple of weeks afterward. I'm going to Coachella this weekend (!), and I've had this inspo saved to ...