I don't know if it's related to all artists, but I think hair extensions are used more often... Look at Ayu xD
Ah, that article was from allkpop, it explains all
There are some news in it though:
Quote:
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BoA’s new album will be released in August and one of the producers of the album stated, “This album is more refined than any other before, it will be very trendy and fresh.”
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sounds interesting.
hope trendy doesn't mean autotune