The sexy accessory the woman in the middle is wearing appears to be an ankle-monitor, the court-ordered device used to either keep track of people on house arrest or to test blood alcohol levels.
It's definitely a statement piece that takes the Party Girl vibe to the next level, which will likely result in awkward tan lines. A smart dresser, the woman wrapped the monitor in plastic to protect it from the elements on the beach.
The pic has been viewed over 525,000 times in two days, whether or not people have bothered to look down at her ankles.
"Wouldn't stop me from banging her. Would make her less likely to bang me," Imgur user TheDouche wrote, living up to his name.
Maybe the girls were in the middle of filming Spring Breakers 2: 2 Spring 2 Break.