She posted an audio clip of herself singing Destiny Child's "Brown Eyes" with the message, "Listening to TS<3 Destiny's Child - Brown Eyes alone in Singapore. #Bored Taengoo."
It looks like Taeyeon sang from a hotel in Singapore, where the girls are currently staying for the '2013 Asia Style Collection'.
Fans commented, "Next time, film your face too," "OMG, Taeyeon," and more.
Check out the clip below!