By Jon Boon - Breaking Celebrity News Reporter

Jessica Simpson was completely blindsided by her father’s reported gay bombshell, a source close to the Simpson family exclusively tells Breaking Celebrity News.

The pop star-turned-fashion-designer is struggling to come to terms with the revelation that dad Joe, 54, a former youth minister and Baptist pastor, has come out of the closet the source says.

But the insider insists that the 32-year-old Dukes of Hazzard star, who has a number of close gay friends in her life, has vowed to stand by her father despite his sexual preference.

“Jessica had absolutely no clue that her father was gay, not even the slightest inkling,” the source tells Breaking Celebrity News. “She thinks she has very good gaydar, especially since a lot of her friends are gay, but she did not see this coming at all.

“It was a complete shock to the system, she feels terribly for her mom who was left reeling by the announcement and her sister Ashlee has also taken the news quite badly.

“Jessica’s been trying to process the information slowly, but she’s having difficulty dealing with it. She can’t understand why Joe stayed married to Tina for so long, and can't help wondering how much of their life was a lie," the source continues.

“Despite that, she’s going to stand by him and support his decision. After all, he’s still her father and Joe’s always been there for Jessica whenever she’s needed him... And not just as a father, but as her manager too."

The National Enquirer broke the bombshell news that Tina filed for divorce after Joe came out as gay and confessed to an affair with a 20-something boy toy, according to a source close to the Simpson family.

“Joe got the family t