Nicole Kidman's quiet Met Gala snub has taken on new meaning in Hollywood this week, after it emerged that her ex-husband Keith Urban will join Hugh Jackman on stage in Melbourne this September for a star‑studded John Farnham tribute concert, while she continues to align herself firmly with 'Team Deb' in the actor's messy post-divorce world. The news came after weeks of speculation that Kidman has chosen sides following Jackman's separation from…