Did Led Zep Steal ‘Stairway to Heaven?’ [VIDEO]

This controversy is not new, but the courts are now involved in a lawsuit that claims that the song 'Stairway to Heaven' is a rip-off of a song by the group, Spirit.

I've listened to the song in question and I frankly don't think it's all that similar. You decide what you think.

Did Zep rip-off this song?