Every once in awhile, if someone tags a celebrity in a Tweet, they might get free hearing aids.

At least, that's what Eugenie Bouchard showed her followers when she offered to buy a fan's hearing aids. The fan was going to sell limited edition Bouchard merchandise before the Canadian stepped in. The chain reaction of kindness continued when a hearing aid company offered to send the fan their "top quality" aids for free.

Bouchard loved the train-of-kindness, but still wanted to send something to the fan.

The fan will not only keep her rare 1/3 collectible items, but she will get free hearing aids along with something special from Bouchard.