Selena Gomez and Benny Blanco. (Allen J. Schaben/Los Angeles Times via Getty Images)Selena Gomez will soon be a Mrs. - she and Benny Blanco are reportedly gearing up to say "I do" at an ultra-private, star-studded ceremony on Saturday, Sept. 27, in Montecito, Calif.While neither has confirmed the date of their nuptials, there have been reports that their wedding weekend is well underway: According to TMZ, a white marquee was installed on a sprawling Montecito estate, along with a nearby dark gray canopy, where Gomez and Blanco are said to be exchanging their vows.