Regarding
#10 :
The "DJ" letter shapes are a marked improvement.
Rotating the silhouette counterclockwise was good, it is easier to produce an icon now that the bounding rectangle for the outline is closer to a perfect square.
"ua" should be either in lower case or small caps.
The "Lua" lettering should use a heavier weight, similar to the "DJ" weight.
The pink headphone earcup works really well with the silhouette, because the silhouette is flat and cool, while the earcup is hot and has the highlight - it really pops out. This very effectively communicates the music-oriented nature of the product.
We like a clearly feminine silhouette. The forehead in
#8 was strongly female, while
#10 seems quite masculine. Note that "Lua" is the portugeuse word for "Moon" (feminine noun form).
We like the long flowing hair style in
#8 for the same reason, it is feminine.
The logo text and silhouette will always appear on a dark background. For the best rankings, specimens should be submitted on a black background.