SISTAR's Hyorin was touched by a unique fan letter she recently received.

On August 8th, the singer shared the above photo via SISTAR's official Twitter page and wrote, "Ahh.. I'm so touched! I didn't know! Thank you so so much."

A fan had written Hyorin a message on the back of a receipt, which read, "Unni I'm a fan of yours. I will always cheer you on ^^."

Netizens who saw her tweet also seemed to be impressed, as they wrote, "Wow who wrote that? Jealous!", "I would be touched too!", and more.

Meanwhile, Hyorin and the rest of the SISTAR members are actively promoting their summer single, "Loving U".

Source & Image: SISTAR's official Twitter