Sexy nun too far for Lady Gaga?

Lady Gaga appears in costumes resembling a nun's habit in the video "Alejandro."

Tough story to ignore this week, it's one that's making noise across the religious blogosphere.

Lady Gaga's exceptionally long music video (which apparently people still make) "Alejandro" uses a lot of Catholic imagery - including Gaga dressed up as a sexy nun in a shiny red and white habit and eating a rosary.

Another pop star, Katy Perry, had this to say on her Twitter account:

Using blasphemy as entertainment is as cheap as a comedian telling a fart joke.

When Katy Perry, whose big hit is "I Kissed a Girl," tweets that your music video is crossing the line into blasphemy, you may be in trouble.

Perry told a French radio station over the weekend she is a big Gaga fan, but:

I think sometime spirituality and sexuality are separate things, and when you put them together it gets interesting for some people.