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Jonathan Cheban’s been looking better than ever these days — just look how well he cleans up in a suit and tie! — and we’re thinking his relationship with Anat Popovsky has something to do with that! On Friday, December 6, the Keeping Up With the Kardashians star was spotted on the beach in Miami, where he frolicked in the waves with his gorgeous gal. Despite his recent appearance on The Millionaire Matchmaker (which Jonathan confirmed was just a favor to a friend), the reality star looked…