Here is a list of songs which have subliminal messages when played backwards on certain parts of the songs-
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Led Zeppelin-Stair Way To Heaven (Forwards)
If theres a bustle in your hedgerow
Dont be alarmed now,
Its just a spring clean for the may queen.
Yes, there are two paths you can go by
But in the long run
Theres still time to change the road youre on.

AND (Backwards)

So here’s to my Sweet Satan.
The one who’s little path
Would make me sad,
Whose power is satan.
He’ll give you 666.
there was a little toolshed,
where he made
us suffer sad Satan.
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John Lennon-Imagine (Forwards)
Imagine All The People

AND (Backwards)

The People War Beside Me.
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The Beatles-Im So Tired

(Indistinguishable Gibberish)

AND (Backwards) Paul is a dead man miss him miss him miss him.
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Yoko Ono-Darling Hug Me

AND (Backwards) I Shot John Lennon.
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Britney Spears-Baby One More Time

Forwards (Give me a sign)

AND Backwards (Sleep With me im not too younge.)
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there are lots of songs out there that have subliminal messages a lot have satanic messages mainly but some have others
so next time you listen to a song try listening to them backwards maybe you will hear the illumanti in them.