Keith Urban

Keith Urban at the "American Idol" finale in Los Angeles on May 16, 2013.

Keith Urban and Nicole Kidman attend the 2013 CMT Music awards at the Bridgestone Arena on June 5, 2013, in Nashville, Tenn.

Keith Urban performs onstage during Fox's "American Idol 2013" Finale Results Show at Nokia Theatre L.A. Live on May 16, 2013, in Los Angeles.

Keith Urban attends the "American Idol" Judges And Host Photo Call at Jazz at Lincoln Center on Sept. 16, 2012, in New York.

Nicole Kidman and her husband Keith Urban arrive at the 2011 CMT Music Awards in Nashville, Tenn., on June 8, 2011.

Country artist Keith Urban performs during the 43rd Annual Country Music Awards in Nashville, Tenn., Wednesday, Nov. 11, 2009. Urban was born in New Zealand in 1967 and began his country career in Australia, where he began by winning singing contests at age 8.

Country singer Keith Urban and actress Nicole Kidman attend the 43rd Annual Country Music Awards in Nashville, Tenn., Wednesday, Nov. 11, 2009. Urban and fellow Aussie Nicole Kidman were married in 2006 and have a daughter together.

Keith Urban performs a medley at the ACM Artist of the Decade All Star Concert in honor of George Strait on Monday, April 6, 2009, in Las Vegas. Urban recorded his first solo album in 1990 with EMI in Australia; four singles off the album went number one in Australia, New Zealand and Germany.

Singer Keith Urban looks at his wife actress Nicole Kidman as they arrive at the 44th Annual Academy of Country Music Awards in Las Vegas on Sunday, April 5, 2009. Urban and Kidman met at a Hollywood event honoring Australians in 2005.

Brad Paisley and Keith Urban perform "Start a Band" at the 42nd Annual CMA Awards on Wednesday, Nov. 12, 2008, in Nashville, Tenn. Urban made the big move to Nashville in 1992 and began work as a guitarist for Brooks & Dunn.

Country singer Keith Urban performs during the NFL Opening Kickoff concert in Columbus Circle Thursday, Sept. 4, 2008 in New York. In Nashville Urban formed a three piece group called The Ranch that released one album in 1997.

Keith Urban, Usher and Natasha Bedingfield listen to questions at a New York news conference Wednesday, Sept. 3, 2008. The three singers were scheduled to perform during a free concert in New York's Columbus Circle in conjunction with the National Football League season opener.

Nicole Kidman and Keith Urban at Nashville Predators vs. Detroit Red Wings on April 20.

Keith Urban pats the tummy of his pregnant wife Nicole Kidman on the purple carpet of the CMT Music Awards Monday, April 14, 2008 in Nashville, Tenn. Urban's daughter Sunday Rose Kidman Urban was born on July 7, 2008.

Keith Urban performs during a tribute to Willie Nelson at the BMI Country Awards in Nashville, Tenn., Monday, Nov. 5, 2007. Urban released his self titled American debut in 1999. The album produced three top five hits.

Keith Urban escorts his wife, actress Nicole Kidman, along the red carpet at the 2007 ARIA Awards on Oct. 28, 2007, at Acer Arena in Sydney, Australia. Urban has had dark moments throughout his successful career. He has checked into rehab twice, once in 1998 for cocaine abuse, and a second time in 2006 for alcoholism.

Country singer Keith Urban performs on stage at the first Sydney date of his "Love, Pain and the Whole Crazy Thing" tour at the Acer Arena on May 15, 2007, in Sydney, Australia. Urban made history on August 21, 2006 when his single "Once in a Lifetime" off his album "Love, Pain and the Whole Crazy Thing" set a record for the highest-debuting country single in the history of Billboard's country charts.

Country music star Keith Urban meets fans as part of the Sunrise breakfast show in Martin Place on March 23, 2007 in Sydney, Australia.

Singer Keith Urban performs at the Mod Club in Toronto on Valentine's Day, Feb. 14, 2007. Urban became popular in America touring as a supporting act for country stars such as Brooks & Dunn, Martina McBride, and Kenny Chesney.

Musicians Kenny Chesney and Keith Urban backstage during the 41st Annual Academy of Country Music Awards held at the MGM Grand Garden Arena on May 23, 2006 in Las Vegas, Nevada. Urban gained fame in America opening up for Kenny Chesney and other country stars.

Nicole Kidman and Keith Urban married on Sunday June 25, 2006, in a cliff-top church in Sydney. The couple released this photo shortly after the wedding, saying "we just want to thank everyone in Australia and around the world who have sent us their warm wishes."

Keith Urban performs his song "Better Life" with a choir made up of people displaced from the Gulf Coast by Hurricane Katrina at the CMT Music Awards show on Monday, April 10, 2006 in Nashville, Tenn. Urban won video of the year for the video based on the song.

Keith Urban, of Australia, accepts the award for entertainer of the year during the 39th Annual Country Music Association Awards, Tuesday, Nov. 15, 2005, in New York.