The 69-year-old former first lady was all smiles Monday while wearing the pink "Hillary" pumps from Perry's recently-launched Katy Perry Collections.
"POWER PUMP," Perry captioned a photo on Instagram of Clinton. "@HillaryClinton is wearing #TheHillary (OMG I LOVE HER SO MUCH)."
The baby pink Hillary heels feature a pointed toe and a lucite heel embedded with gold stars and moons. Perry told People in February the celestial details were meant to give Clinton "a pep in her step."
"I chose some of my favorite girlfriends and my female family members and named all the shoes after them. So they're all getting their own shoe, I guess, so that's fun," the 32-year-old singer said.
"I tried to pair the shoes that best represented their personality. I didn't necessarily shape the shoe after them, but I decided to make the shoes more name-specific in the end," she added.
Perry was a staunch supporter of Clinton during the 2016 presidential race. The former first lady presented Perry with the Audrey Hepburn Humanitarian Award at the UNICEF Ball in November after losing the election to Donald Trump.
"I've gotten to spend time with her and I know how deeply she cares about making our world a better place," Clinton said at the gala. "We need champions like Katy now more than ever."