Keith Urban is celebrating his 45th birthday today (October 26)! Despite already having released six albums and notching 14 No. 1 hits in 13 years, it seems like his best days are still ahead. On a personal level, Urban's found the love of his life and they're raising two cutie-pie daughters together. Nicole Kidman has also become his muse, leading the singer to make stronger music than ever. 

How well do you know the superstar and 'American Idol' judge? Our team of researchers spent hours over the last few weeks pouring over magazine articles and old interviews to stump you with these 10 things you probably don't know about Keith Urban. OK, actually it was just one guy, a pot of coffee and an internet connection, but the facts are still juicy enough to leave all but the most faithful, borderline stalker fans amazed. Click the button below to get started.