BaCkWaRd MeSsAgEZ
Britney Spears - Hit Me Baby One More Time

Forward : You will be here and give me a sign...
Backward : Sleep with me I'm not too young.
Eagles - Hotel California

Forward : And I was thinking to myself, 'This could be Heaven or this could be Hell' Then she lit up a candle and she showed me the way There were voices down the corridor, I thought I heard them say...
Backward : Yeah Satan, he organized, oh, he organized his own religion. Yeah, when he knows he should, how nice it was delicious, he puts it in a vet he fixes it for his son, which he gives away.
Led Zeppelin - Stairway To Heaven

1.Forward : ...buying the stairway to heaven...
   Backward : Pl-a-a-a-a-a-y backward. Hear words sung.

2. Forward : ..your stairway lies on the wisp'ring wind..
    Backward : I will sing because I live with Satan

3. Forward : If there's a bustle in your hedgerow.. Don't be alarmed now.. It's just a spring clean for the May Queen.. Yes there are two paths you can go by.. but in the long run.. There's still time to change the road you're on...
    Backward : Its to my sweet Satan, the one whose little path would make me sad, whose power is fate. He will give you give you 666. There was a little toolshed where he made us suffer, sad Satan.
Metallica - Am I Evil ?

Forward : ...Am I evil? Yes I am. Am I evil, I am man, yes I am....
Backward : I am Satan. I am. I am. O-oh yeah, I'm it. I am Satan.
O-oh yeah, I'm it. Yes, I'm it.
AC/DC
1. Love At First Feel
Forward : ...love at first feel, love at first feel...
Backward : ...we've served him.. we've served the devil..."

2. Dirty Deeds
Forward : If you're havin' trouble with the high school head. He's givin' you the blues. You wanna graduate but not in his bed. Here's what you gotta do.
Backward : Oooh.. Should I discuss it.. Hey Satan I'm the millionith guy to know me.. Smooth Murdering is easy.. Hey who is not? I killed one last night.. Hail Satan.
Backward Messages at Wikipedia