Kidman also paid honor to the couple's 12 years together with a sweet snippet of their wedding video, captioned, "Remembering 12 years ago today at a church in Manly, Australia. Still feels like it was yesterday. I’m a lucky woman Happy Anniversary Baby."
"'Gemini' started with the four of us in that room -- Ian Kirkpatrick, Justin Tanit and Julia Michaels and myself,” he explained. “Ian had a cool groove going and I started playing guitar and melody starts coming. Justin and Julia are asking me about Nic, 'Tell us about Nic.' And I said, 'Well, she's a Gemini,' and they're like, 'Ooh.' And Julia starts singing, 'Baby, she's both,' and the song just started to take off from there."