Christie Brinkley delighted fans as she shared ... The supermodel, 70, looked gorgeous in a navy blue maxi dress that featured a polka dot print, contrasting white cuffs and a button-down design.

MORE: Christie Brinkley calls '70 the new 40' as she highlights curves in plunging dress "Happiest of birthdays to you Christie! Fellow Aquarian! Just beautiful as always," one wrote, with ...