4minute's Sohyun wished her fellow member, Nam Jihyun, a happy birthday. On January 9th, she tweeted, "Our Nam Jihyun! It's her birthday~We had a small party at the filming site." Sohyun added, "Fans~Thank you for singing happy birthday to Jihyun unni! Happy birthday, unni~I love you!" In her attached photo, Jihyun beams happily as she cuts into her birthday cake. Fellow member�Gayoon stands next to her,�looking on contentedly. Both girls wore teal windbreakers with name labels on the front, proving that they were filming for the upcoming MBC special, 'Idol Star Athletics and Swimming Championships'. Netizens replied, "Happy Birthday!" and "Feels great�to see the unnis smiling~". Source + Image: Star News