The Heart Attack singer, 20 - who's also a judge on Simon Cowell's show US X Factor - last night revealed she enjoys clambering up walls.
'I love rock climbing,' she Tweeted alongside a snap of herself scaling a sheer face at an indoor activity centre.
But 21-year-old Selena Gomez's BFF warned followers that her hobby can have painful consequences if necessary safety procedures are ignored.
'That one time I sprained my foot because I was the idiot that rock-climbed without strapping into a harness first. Not my brightest moment,' said Demi.
'Worst part is - I wasn't trying to be ballsy. I just forgot... WHO DOES THAT?!!!!??!!!'