Check Out Robin Thicke's MAJOR Makeover

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What a difference a decade makes! Before Robin Thicke had one of the biggest summer hits of 2013, he was just a long-haired up-and-coming artist related to the Growing Pains dad.

This pic from Feb. 2003, when Thicke was just 26 years old, shows the Blurred Lines singer rocking some seriously long locks, a far cry from the smooth, clean-cut style he sports today.

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What do you think of Thicke's dramatic makeover? Should he grow out his hair?