Swedish pop star Tove Lo flashed the crowd at Boston Calling on Saturday afternoon, lifting her shirt and exposing her breasts before encouraging the crowd to do the same.

But the singer’s sudden exposure is not a random act. Tove Lo has long been flashing her audience from on-stage, and some draw parallels to the #freethenipple campaign, a movement that stands “… against female oppression and censorship, both in the United States and around the globe,’’ according to its website.

The crowd’s reaction was swift, and can be heard in this video. (NSFW, if you happen to be working on a Saturday):


She got fans singing along to her biggest hits — “Habits’’ and “Talking Body’’ — while introducing the crowd to some of her lesser-known material over a 50-minute set.

Despite the afternoon sun, she shed her shades early, but told the crowd to keep theirs, saying “you guys look really cool.’’

Photos from Boston Calling: