Sometimes the cover for great songs like Adele Rolling in the Deep get great popularity among people that people start to believe that they are the original composers. People forget the original version and start to adore the cover version of the songs. One fine example is Adele Rolling in the Deep cover. Hallelujah was a song sung by Leonard Cohen, Jeff Buckley, John Cale and Rufus Wainright. There is great possibility for one original version to have more than one cover version. Many people could not judge which one is the best because each one of them shows the mastery of the singer. This song was originally written by Leonard Cohen but he did not perform it well. But for his version all the other cover versions are superior. The one by Rufus Wainwright was smooth and beautiful and so this was hailed by public. Some like that of Buckley because of the mellow guitar.