Lady Gaga requested a house that was "paparazzi proof..

Mauricio Umansky pitched Lady Gaga a mansion onstage at one of her gigs. Umansky, who is married to "Real Housewives of Beverly Hills" actress Kyle Richards,

spoke to FOX Business about his new novel, "The Dealmaker." The real estate mogul wrote about meeting the "Just Dance" singer.

"Lady Gaga walked in, and she was really charming and gorgeous and fantastic as [she] usually is, and she came in and straight focused kind of on me quickly.

Mauricio, you sell real estate," she says. "I've never bought anything, but I want to," he said.

Backstage at the concert, Richards and Umanksy ran across "Real Housewives of New Jersey" actress Melissa Gorga and her husband, Joe.

Umansky chuckled. She wanted a location with a house for her animals, horses, and chickens and paparazzi protection,

whatever that means. I'm listening and told her, "You know, I can only think of one house that meets your criteria."

I never asked her the price. I never asked, "Where?" I answered, "I can think of one house that meets the criteria."

Umansky said Lady Gaga flew to Los Angeles the next day and bought the residence.