These sizzlin' stars took time away from the tunes at Coachella to cool off by the pool ... dive into our gallery of celebrities who have shared plunge pics last year, to see who made a splash while in Indio!!!
As for the lineup ... Childish Gambino closed out night 1 of the Festival outside Palm Springs. Saturday night's headliner is is Tame Impala. And Suinday night is all about Ariana Grande ... TMZ broke the story, 'N Sync will be one of her surprise guests. They'll perform, we're told, but we don't know if it will be singing or dancing. The boy band was Ariana's jam growing up.