More than 40 years after releasing its hit "Stairway to Heaven," Led Zeppelin is being sued by the band Spirit for allegedly ripping off a portion of its song "Taurus" and using it as the opening for "Stairway."

Spirit has filed a copyright infringement against Led Zeppelin.

The band is seeking a writing credit for Spirit lead singer Randy California, who passed away in 1997.

Back in '97, California was quoted as saying: "The guys made millions of bucks (off) it and never said 'Thank you,' never said, 'Can we pay you some money for it?' It's kind of a sore point with me."

And understandably so. Led Zeppelin has made millions of dollars off of the song.

If California is awarded a writing credit, he'll most likely be owed a ton of money.

Check out both of the songs below and let "The Free Beer & Hot Wings Morning Show" know what you think.

Skip to the 45-second (0:45) mark of "Taurus" and compare it to the beginning of "Stairway to Heaven."

Source: Free Beer & Hot Wings