Lorde danced above the crowd as fans sang along. In a white button-down with a bikini top underneath and baggy jeans, the singer punched the air and swayed as listeners lifted their phones to capture the moment, flashes lighting up the darkened park.

Lorde texted her fans to meet her “in the park” on Tuesday and those who figured it out headed to New York’s Washington Square Park in droves. The nearly 10-acre park in Lower Manhattan was swarmed with hoards of people as the star stood over the crowd and blasted her new single “What Was That” from speakers.

Oh, just the sound of an impromptu Lorde concert taking place in New York City. On Tuesday night, everyone’s favorite quirky pop star surprised fans when she held a pop-up in Washington Square Park, performing her new track “What Was That,