The actress – wearing a white daisy-printed summer dress and chunky tan peep toe heels – popped into Planet Blue in Beverly Hills on Tuesday with a girlfriend to shop for her festival fashion necessities.
"She was at the store for about three hours playfully balancing clothing hangers on her head and swinging dresses around as she held them up to herself in the mirrors," a source tells PEOPLE.
Asking the staff for their opinion on some of her looks while "obsessing over Skrillex's new album," the star tried on several "flowy pieces" but ended up purchasing gold metallic pants and lace tops.
"She was very friendly," adds the source.
Coachella kicks off April 11 – and we'll be looking out for Hudgens in her gold pants!