Elvis Presley did a movie with Mary Tyler Moore in 1970 called "Change of Habit"

In the ending of the movie, Mary Tyler Moore appears in the pews of a church as a nun in full habit. The church has many statues and a beautiful crucifix. A Mass is being celebrated. The priest is wearing traditional Roman vestments. The sanctuary has a spectacular Gothic design. There are no "altar servers," there are only "altar boys" in cassock and surplice. The Mass is being celebrated ad orientem--that is, facing east--and the tabernacle is on the altar in the middle.

And Elvis Presley is banging on his guitar just outside of the sanctuary, singing, "Let us sing together to the Lord."

You either had to laugh or cry. Elvis and his hootenanny combo are not facing the sanctuary in worship; they are facing the people, with their backs to the altar and tabernacle. The people are being entertained, while the Mass takes place in the distant sanctuary. The priest and his altar boys seem oblivious to the vulgar behavior taking place just outside the sanctuary.

Do you see the symbolism here?

Here is the a clip of the ending of the movie: