This weekend, 25-year-old Gomez was pictured rocking her new white sneakers and shiny, teal ankle weights.
As mentioned, Zac Efron is also big fan of the hack, often seen with his trainer wearing the bizarre, but useful, accessory whilst hitting a trail or two.
This retro workout hack is a pretty easy way to up the intensity of low impact exercises by burning calories and building muscle at the same time. So we can imagine Selena was working up a bit of a sweat with a big day of walking all over an amusement park.
However, experts say there are some risks involved – ankle weights could increase your chance of injury as they can strain the ankle joint and leg muscles. If you're new to exercise, keep the weight low and the workout short and increasingly build up for best results.