Sweet Emotion: Steven Tyler wrote this song when the band was going through a rough time.
Sick, Sick, Sick: from Queens's 2007 album Era Vulgaris, is also thought to have a hidden message.
Stimulate: Eminem The rapper's song 'Stimulate' from his '8 Mile' soundtrack also has a portion.
Fire On High: Electric Light Orchestra The Electric Light Orchestra also used the backmasking technique on their song.
Free As A Bird: The Beatles The original demo for this song was recorded by John Lennon in 1977.
Empty Spaces: Pink Floyd Pink Floyd were known as the masters of hidden messages.
Darling Nikki: Prince's sexually-charged song was part of the soundtrack for his 1984 movie 'Purple Rain.
Another One Bites The Dust: Queen's tune 'Another One Bites The Dust' served as the catapult for the band's big break in America.
Baby One More Time: Britney Spears Britney's first hit was written and produced by Swedish superproducer Max Martin.
Imagine: John Lennon 'Imagine' has become a global peace anthem ever since Lennon composed it in 1971.
Watermelon Sugar: Harry Styles Harry Styles's hit song 'Watermelon Sugar' has dominated the airwaves for nearly.
All Too Well: Taylor Swift Taylor Swift made waves when she released 'All Too Well' on her 2012 album 'Red.
Taylor Swift: The song includes the lyric, "And I left my scarf there at your sister's house.
Twinkle, Twinkle, Little Star' – Nursery rhyme: No this one isn't a hit song, but the nursery rhyme does have an interesting meaning.