Here it is: backmasking

There some other ones too

 

Thats freaky

 

u guys didnt know bout that? i found that out like 3 years ago, lol. its pretty cool huh.

 

i never knew that the song "another one bites the dust" said its fun to smoke marijuana backwards, lol, thats pretty awsome. how do they do that? the eminem one is cool too. u gotta be pretty good to sing or rap normally... but u gotta be even better to sing/rap normally and reversed at the same time and make sence, lol.

 

intresting

 

ya its been around for awhile, there is also one that reverse a britany spears songs,and alot of songs by ICP.