It’s no secret that celebrities, like everyone, have their ups and downs. But, when they make a comeback, they do it in a big way.
10. Keith Urban
In June of 2006, the country singer married fellow Aussie Nicole Kidman, but by the end of the year, he had checked himself into rehab for drug and alcohol abuse. He completed the program in 2007, and went on to release several successful albums, in addition to becoming a judge on American Idol.
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