Singer Lady Gaga has hit back at a Catholic blogger who insinuated she is a hypocrite for sharing her Christian faith while living an "obscene life".

The 30-year-old challenged the author of an article entitled 'From Lady Gaga to Steph Curry: 5 Things to Remember When Celebrities Share Their Faith' featured on Catholic Link.

The article came days after Lady Gaga posted a photo of herself and a priest sharing the eucharist, thanking him for teaching that "eucharist is not a prize for the perfect but the food that God gives us".

"It has become somewhat of a trend for celebrities to share their faith," wrote Becky Roach, author of the article.

"Many celebrities are sharing Bible verses, quoting priests, and singing Christian music while at the same time still leading a typical Hollywood lifestyle void of Christian values such as modesty and purity."

Roach referred specifically to the singer as someone who "has unfortunately done a variety of obscene things", yet has turned back to the faith.

Lady Gaga reacted to the article in an instagram post:

"Dear Becky Roach, Mary Magdalene washed the feet of Christ and was protected and loved by him. A prostitute. Someone society shames as if she and her body are a man's trash can. He loved her and did not judge. He let her cry over him and dry his feet with the hair of a harlot. We are not just "celebrities" we are humans and sinners, children, and our lives are not void of values because we struggle. We are as equally forgiven as our neighbor.

"God is never a trend no matter who the believer," the singer wrote.

The article did applaud her for provoking discussion of the eucharist after her initial instagram post and even suggested that her post would be a useful tool in starting future conversations about the sacrament.