Happy 21st birthday to MBLAQ's Thunder! On October 7th, stars and MBLAQ fans made sure to wish Thunder a happy birthday through their Twitters and me2day. First, Thunder's loving older sister, Sandara of 2NE1, showed her affections with the post, "Happy happy birthday to my little brother Chundoong-ee!". Singer Rain warmly tweeted, "Happy birthday Doong-ah, our Doong-ee was just a tall and kind high schooler but now you're a handsome man, I love you our maknae ^^ As for your gift~ I'll give it to you before enlisting haha", to which Thunder replied, "Thank you hyung! ? As for the gift... Everything you've taught me over the past 2 years has been a gift! I'll make sure to go to your concert on October 9th! I will become a better singer! I love you Ji Hoon hyung! ?". Fellow MBLAQ member Mir congratulated , "Doong doong-ee hyung happy birthday!! Congratulations!", to which Thunder responded by saying, "Thank you mak-doong ah (youngest)~ ? I'll see you later". Singer Se7en also sent the birthday boy his warm congratulations, and the two had a rather cute conversation and exchanged the following tweets: Se7en: "Doong-ah~!! I wish you a very happy birthday! I'll expect you to fly even higher! We love U too!!! Go MBLAQ!!!". Thunder: "Thank you so much hyung!! ?? I will work harder! Hwaiting!" Se7en: "Okay! Call me, I'll buy you some yummy food ^^" Thunder: "Yay~!! I love Yeolbong steamed chicken hyung!! >_< kekeke" (referring to Se7en's 'Yeolbong' chicken restaurant) Se7en: "Keke you can go buy the Yeolbong yourself~ Pick something more expensive ^^ anyways holla~~" Thunder: "Haha I'll search online and look for a delicious restaurant hyung!! Keke" Thunder also made sure to express his thanks to fans, and tweeted the below photos of a beautiful cake and fan letters saying, "Thank you to all my fans! You made me so pretty... and also remembered my family and the company staff members.. I love you all! >_<".