JENNIFER NETTLES of SUGARLAND got married to her entrepreneur boyfriend Justin Miller on Saturday. She's 37. We're not sure how old he is, but they've been dating for about two years. Here are the details according to "People" magazine: It was a small ceremony at a chapel near the Smoky Mountains in Tennessee. She wore a wedding gown designed by Alexander McQueen and bandmate KRISTIAN BUSH was there. Justin's a former model. If you've seen the video for "Want To", you've seen him, he's the guy sleeping in Jennifer's bed, and she ditches him before getting on the tour bus. He was also her date to the CMAs earlier this month. Jennifer's been married before: She divorced her first husband in 2007.(--He was a club owner named Todd Van Sickle.)Whatever honeymoon plans they have will have to wait until at least next week: Sugarland's performing with LADY GAGA at tomorrow night's Grammy Nominations concert on CBS, and hosting Thursday's CMA Country Christmas special on ABC.