Cute idols look cute when they dancing bubbly in their cutesy songs; whereas the cutest creature on Earth can be cute even in a song titled "Cry Cry".
I've set the start point to 1m12s, so just click the video, watch for ~6s, and you'll see it. Then rewind to make sure what you just saw is true.
If you have not already known, the episode of Pretty Boys that aired on 25th is a special episode, consisting of past video footage that we've seen in previous episodes. As such, the sub group at T-araChina has decided not to sub the episode and thus I won't be able to sub it too.