Monsters I Have Loved

Pazuzu-possessed Regan MacNeil from "The Exorcist" (1973).

Monsters I Have Loved

The pollution-created mutant bear from "Prophecy" (1979).

Monsters I Have Loved

"The Slime People" (1963).

Monsters I Have Loved

"Rodan, the Flying Monster" (1956).

Monsters I Have Loved

Mothra from "Godzilla vs. The Thing" (1964).

The Mothra song performed by The Peanuts.

Monsters I Have Loved

Another obvious choice, but Godzilla is without a doubt my favourite. Here he's seen in his "Godzilla Vs. Hedorah" (aka The Smog Monster) incarnation, 1971.