SNSD's Taeyeon can't sing?

As you all know, Taeyeon of SNSD and Park Hyo Shin performed a duet together at the Seoul Drama Awards, singing their respective OSTs for their dramas. But talks of Taeyeon's singing, and I mean bad talks, spread like wildfire after the performance. Netizens said things like, "She was never on key," "The song doesn't even fit her and she has no emotion," and "She looks like she didn't practice." To Taeyeon's defense, Park Hyo Shin came and stated via his cyworld homepage that he is not only a fan, but that he feels Taeyeon is an extremely talented singer, showing his distress to many of the netizens recent comments. Granted, she was off in the performance, but netizens should cut her some slack. Seems like any kind of mistake a celebrity makes nowadays will be attacked. What do you guys think? Here is the video.