Who do you think is the ONE member SNSD can't survive without?

Taeyeon because she's the best singer and Yoona because she's the face. And both of them are really popular.

Yoona because she seems to be everyone's favorite.

I agree, I think seohyun is a very unique person in SNSD. But she keeps it in herself because she can't say things straightforward...
I LOVE YOU SEOBABY !!

i don't really know but i have to say, it's either Seohyun or Jessica.

-Seohyun is because of her talents are well-rounded. i mean she can sing and dancing very well. plus her well-mannered character that can't be find in other idols

-Jessica because she can be the main vocal. and her ability to speak english fluently.

NOT Yoona-i know she is the most popular member (beside Taeyeon). but if she is not part of snsd, anyone like Tiffany (also among the popular member) can be the face.

Lets go through the list

Taeyeon-if they didn't have taeyeon they wouldn't be known for thier vocal because the other 4 can't compete, plus she is popular for her voice with her OST

Jessica-since she won popularity award I would say she is more use because of her face rather than an actual talent, but SNSD could survive without her

Sunny- replaceable in the since there are other members who have personality and if they needed they could have (i don't know) someone else do aegyo

Tiffany-while English may be a pro, they still can use translator when asked eng questions, her voice isn't all that good, and she isn't as popular as Jes, Yoon, or Tae

Hyoyeon- SNSD aren't known for thier dancing skills so they could survive without hyoyeon

Yuri-def

Sooyoung-def

Yoona- she makes most of the money so I think they would suffer financially without her

Seohyun-def

I can't survive without our Dancing queen! Luv hers!~

If without a member it wouldn't be snsd anymore so every member is important

For me its Taeyeon, Yoona and Hyoyeon

Taeyeon - of course the best singer. Lets say Seo, Jess, Tiff and Sun are good singer too, but they CANT beat Taeyeon's level. Especially THE BOYS. I hear SEOHYUN in one live performance (If I'm not mistakenly, SNSD live in America or LA) she cant reach the 'My boy~' line, so I think she can't be substitute to Taeyeon. Not mentioning Jess, Tiff and Sun, they have unique voice but not that higher compare to Taeyeon's voice.

Yoona - she's the FACE of the group and we're accustomed to find her in the CENTER. And she's one of the best dancer for me (HyoYulYoon) She is also loved by many korean people even people outside the korea. She also bring that SNSD name And, we can't lose her as the Face. We can't deny also her popularity, So, she add POPULARITY to the group because of her angelic pretty face.

HYOYEON - lol. we can;t lose the best dancer, even though, lets say Yoona, and Yuri are here, but no one can beat her. She's the dancing machine. She can make fans goosebumps by her dance lol. especially GENIE, IGAB and INTW. She's important okay?

Sunny!
Why do you think they get treated better than other groups under s.M. enterteiment.
Without her snsd would be just like other girl group