No, he is actually accepting bitcoin.
Just like if someone were to pay in Euros, it would be converted to dollars before reaching him.
no HE is not. HE never has a personal bitcoin wallet.
his recording company ( Caroline Records and Capitol Records ) does not have a bitcoin address.
shopify, may or may not choose to keep a percentage of bitcoins. but knowing their business model in regards to paying royalties to the record company/artist. i dont think they keep much bitcoin if any.