The secrets behind Didi Conn's youthful looks and her life after Grease revealed as Pink Lady icon turns 75

Where are Grease's Pink Ladies? From multiple marriages to a tragic death, what became of Rydell High's bad girls five decades on - as Didi Conn lands new beauty campaign at 74

Didi Conn who played Pink Lady Frenchy in Grease fronts new beauty campaign, see her now at 74

John Travolta's son Benjamin, 14, has grown into his spitting image as Grease star proudly shares new clip