By Patricia Reaney NEW YORK (Reuters) - Hip-hop artists Macklemore & Ryan Lewis scored the most American Music Awards nominations on Thursday with nods in six categories, followed by country-pop star Taylor Swift and singer Justin Timberlake with five each. The duo will compete in the top category, artist of the year, against singer Bruno Mars, Swift, Timberlake and pop singer Rihanna, who collected four nominations. Also getting four nominations were country music pair Florida Georgia Line and R&B singer Robin Thicke. Rapper will.i. ...

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