Girls' Generation's Sunny responded to her fan on Twitter!

On February 23, a fan tweeted to Sunny, "It's final exam week. I miss you so much tangerine."

Sunny brightened up her fan's day by using TWICE's "Cheer Up," and responded, "Cheer up baby~ cheer up baby~~"

Other fans amazed at the fact that Sunny actually responded, commented, "Omg so lucky!", "Woah sunny!", "OMG everyone now will cheer up!"

The fan is indeed very lucky. Just like the sun, she brightened up the day of her fan, how sweet of Sunny!

@sunnyday515 its final exam week i miss u so much tangerine

— kat (@yoonasyj) February 23, 2017

@yoonasyj cheer up baby~ cheer up baby~~

— Sunny (@Sunnyday515) February 23, 2017