The Creature Wasn't Nice, also known as Naked Space or Spaceship, starring Leslie Nielsen.

Quoting from two of the reviews:

The initially minuscule organism promptly grows into a large, tubby, one-eyed, red-skinned, slime-dripping man-eating gelatinous humanoid blob which in time-honored hoary B-movie fashion proceeds to devour most of the crew before being jettisoned into space.

....

As others have mentioned, the creature singing, and dancing is a special, funny treat.

And, video:

The Creature Wasn't Nice, also known as Naked Space or Spaceship, starring Leslie Nielsen.

Quoting from two of the reviews:

The initially minuscule organism promptly grows into a large, tubby, one-eyed, red-skinned, slime-dripping man-eating gelatinous humanoid blob which in time-honored hoary B-movie fashion proceeds to devour most of the crew before being jettisoned into space.

....

As others have mentioned, the creature singing, and dancing is a special, funny treat.

And, video:

The Creature Wasn't Nice

Quoting from two of the reviews:

The initially minuscule organism promptly grows into a large, tubby, one-eyed, red-skinned, slime-dripping man-eating gelatinous humanoid blob which in time-honored hoary B-movie fashion proceeds to devour most of the crew before being jettisoned into space.

....

As others have mentioned, the creature singing, and dancing is a special, funny treat.

And, video:

The Creature Wasn't Nice, also known as Naked Space or Spaceship, starring Leslie Nielsen.

Quoting from two of the reviews:

The initially minuscule organism promptly grows into a large, tubby, one-eyed, red-skinned, slime-dripping man-eating gelatinous humanoid blob which in time-honored hoary B-movie fashion proceeds to devour most of the crew before being jettisoned into space.

....

As others have mentioned, the creature singing, and dancing is a special, funny treat.

And, video: