His longer locks are a part of his signature look, but new reports are alleging that Keith Urban is hiding a big secret about his hairstyle. 

Nicole Kidman Wants Keith Urban To Star In A Movie With Racy Sex Scenes?

According to OK! Magazine, the singer and American Idol judge has employed classic techniques to keep the truth that he could be going bald a big secret-and that he's actually wearing a wig. 

"He's either got a wig or plugs," a source told the magazine. 

Nicole Kidman Dishes On How She And Keith Urban Stay In Touch While Apart

The magazine also claims that many in the industry seem to believe that Urban's hair isn't quite as natural as it used to be, after his hair appeared to be thinning out a few years back-but that it has since gotten much thicker and fuller.  

Naturally, Urban has not responded to the reports, though it isn't the first time there have been rumors about the singer making himself look younger.  

OK! also claimed back in August that both Urban and his wife, Oscar-winning actress Nicole Kidman, were addicted to Botox treatments, with Urban determined to keep his youthful look.  

"He is getting Radiesse fillers, because he's determined to keep that baby face his female fans love," sources allegedly said at the time.  

Sources also allegedly said at the time that the couple was in some sort of a competition to see who could look even more youthful, and that their family and friends were getting worried that they were both going overboard.  

"People are worried, but it's too awkward to bring up," sources said.  

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