Former SNSD member Jessica wished her sister Krystal on her birthday via Weibo on Sunday.

She uploaded a picture with Krystal captioned “Happy Birthday my baby. Don’t grow up too fast.”

The two sisters smile in the photo, showing off their affection for each other.

Recently a media outlet reported that Jessica is gearing up to launch a cosmetics brand following her fashion business. She launched her own fashion line Blanc in August last year.

Meanwhile, four-member f(x) will drop its new album “4 Walls” on Tuesday and show up on diverse music programs starting with Mnet’s “M! Countdown” on Thursday.

By Kim Yu-jin (kimyujin@heraldcorp.com)