Super Junior member Choi Siwon made a surprise appearance on 'Thank You' bearing gifts for his best friend BoA.

One official from 'Thank You' said, 'Choi Siwon is known to be a close friend of BoA. He was invited by BoA to make a surprise appearance on their 'Thank You Trip' starring Son Hyun Joo, BoA, and Moon Jung Hee.' Not only that, 'Even the staff was impressed when Choi Siwon came bearing a bundle of gifts in either hand, all of which he paid for out of his own pocket.'

In addition, while sharing the story of how Choi Siwon met BoA, he said 'I'll never forget the day I met BoA. She really took me by surprise,' making everyone curious about their friendship. He went on to say, 'I'm close enough to BoA that I could be her manager,' and 'Instead of calling BoA by her name I call her 'Bo Neu Nim,' eliciting laughter from everyone there.

Yoo Hae Jin, who is also close with BoA and Son Hyun Joo, appeared on the show as well, and shared the story of how they met and began their friendship. This episode of 'Thank You' is scheduled to air on August 9.