BoA recently showed her support for 'K-Pop Star' contestant�Baek Ah Yeon and her successful debut.

BoA congratulated Baek Ah Yeon tweeting, "Baek Ah Yeon, 'K-Pop Star's first singer to make her debut, is currently making an all-kill on music charts with 'Sad Song'! Please support Ah Yeon, who is maturing into a great singer."

BoA's relationship with the singer dates back to the early days of 'K-Pop Star' as BoA featured as a representative judge for S.M. Entertainment on the show alongside Yang Hyun Suk and J.Y. Park, on behalf of their respective agencies. Contestant Baek Ah Yeon eventually made it into the Top 3 of the audition program and later joined JYP Entertainment with winner Park Ji Min and finalist Park Jae Hyung. Baek Ah Yeon made her debut with "Sad Song" on the 10th and quickly grabbed the #1 spot on real-time charts.

Stay tuned for Baek Ah Yeon's debut performance of "Sad Song" on SBS' 'Inkigayo' on September 16th!

Source: BoA's Twitter Image: TVdaily