Journalist Gayle King, plus-sized model Hunter McGrady and returning stars Chrissy Teigen and Kate Upton pose on separate covers unveiled on Tuesday for Sports Illustrated's 60th annual swimsuit issue. Gayle King shared behind-the-scenes moments from the shoot for the swimsuit cover of Sports Illustrated. First-time Sports Illustrated model King, the 69-year-old co-host of "CBS Mornings," smiled in a pink-and-green patterned …