^ I think you're just forcing yourself to not see BoA, if you don't think she looks like her there.
That's in their perf of a couple of BoA songs btw.
You can see in one of my very first posts in the SNSD thread I said "She reminds me of BoA". And I'm the kind to usually go against people saying "A looks like B". That was also before I read anything about the two of them being compared, so there was no outside influence.
Some people go a bit far and say she's a BoA wannabe though. She only slightly resembles her, but there is still a resemblance. Though I would only say old school BoA.
Her voice is very different than BoA's but they sometimes sing in similar styles, especially when belting out the high notes.