okay so I'm going to give my honest opinion/critique and if you have, well, submitted your entry, just ignore this HAHHAHA

Both blends look really good! Stunning!
For Hyorin:
Just watch out for slips in blending like the medium Hyorin which is a little transparent and the music notes kinda cover her hair.
Composition is a little messy. My eyes don't know where to focus because all of them look about the same size. Try resizing them to different sizes. The two hyorin on the chair on the right side of the graphic kinda throws me off.
Maybe position them near the biggest hyorin on the chair. So it's like from big to small. Or just remove them entirely. Also, the lighting texture seems to cut off awkwardly at the bottom left of the graphic.
Colouring is good and so are the text <3

For Dara:
Like Hyorin blend, no focal point. The blending from the rightmost two Daras are a little off. The way her arm sort of begins on the top of the other head is a little weird. Same goes to the bottom-most Dara. Try playing around with different sizes and rotate it. But I LOOOOVE the big Dara <3 interesting comp.
Colouring is good as well! Text too!
Personal preference but I feel that both blends could cut down on the number of people there. But if that's your style, keep it :) and work on the blending and positioning.

All in all, good job!
omg if like you feel offended or something, don't hesitate to let me know okay? ;A;
I'm really bad with phrasing critiques.
If you have any questions or anything, PM me as well :D <3
Good job on both blends!

i'm not really a designer but I think you can improve the feel of hyorin's by adding red or a lighter colour rather than a blue, it would show the more sparky feel of happiness, blue seems a little out of context because it does somehow represent sadness. Everything else looks great though, you have mad skills! :)

You would pick my only two female biases....

i voted too :3

dammit!
why do you have to be so talented!
i voted for hyorin, btdubs!