poor old lady, i think she'll die.

isn't the song your thinking of

there was an old lady who swallowed a fly i dont know why she swallowed i fly i guess she'll die

there was an old lady who swallowed a spider it wiggled and jiggled and ticked inside her she swallowed the spider to swallow the fly i dont know why she swallowed the fly i guess she'll die

is that one your thinking of? (btw, that brought back some painful memories) :-)