In the film Project Eliminator (1991), David Carradine plays and sings a very short song on piano. This moment occurs about 26 minutes into the film. The lyrics are:

Troublemaker!
I've got my eyes on you
Don't be mistaken
I'm watching everything that you do
And I can't let you
Get through
To me
Troublemaker!

What is the origin of this song? Was it written for the film? It is definitely not the song by Olly Murs ft Flo Rida.

It appears he is authentically playing the piano:

In the film Project Eliminator (1991), David Carradine plays and sings a very short song on piano. This moment occurs about 26 minutes into the film. The lyrics are:

Troublemaker!
I've got my eyes on you
Don't be mistaken
I'm watching everything that you do
And I can't let you
Get through
To me
Troublemaker!

It appears Carradine is authentically playing the piano, and it seems like he is definitely singing.

The end credits have a section titled "Original Songs" that lists 6 songs, but none of them appears to be this song, and Carradine is not listed as the performer of any of them.

I searched the web for the lyrics and did not find it; it is definitely not the song by Olly Murs ft Flo Rida.

What is the origin of this song? Was it written for the film?