Keith Urban is having some regrets about divorcing Nicole Kidman! But it just might be too late... Per a source for RadarOnline, the country star is really noticing his "lonely reality" lately without his ex wife by his side. We mean, after nearly 20 years together, we can imagine it feels weird to be single all of a sudden! But hey, Keith, what happened to those supposed other girls? Hmm... Regardless, this insider claims he's really going through it: "Keith has been genuinely rattled by how empty everything feels now that Nicole and the girls aren't part of his everyday routine.