Wonder Girls members recently congratulated Sunmi on her first birthday since entering college. On May 2nd, the inactive Wonder Girls member turned 20 in Korean age, celebrating her first birthday after having graduated from high school. The members congratulated Sunmi on her birthday by leaving her special messages on Twitter. Yenny tweeted, "Happy Birthday! Baby", while Yubin tweeted, "Happy birthday! Our cutie, today is your day! Have fun." Hyerim, who joined the group last March, tweeted, "Sunmi happy birthday". Sohee, too, tweeted, "You were really touched, right? Ha! If I go [back to Korea], we are having birthday parties for both of us." Sunmi responded to Sohee by tweeting, "You sharp knife-life woman." Sunmi left the group temporarily last January for her studies and recently entered Dongkuk University in the class of 2011. Source: Star News via Nate