Although world renowned musician and singer AR Rahman is known for his original composition, but this time his originality is under a cloud.Swedish musician Eagle-Eye Cherry ’s popular song, ‘ Save Tonight ’ from his album 'Desireless' is identical to Rahman’s 'Challa' song from his latest movie Jab Tak Hai Jaan , especially the opening notes of guitar.'Save Tonight' is one of the best known songs of Cherry and has gained popularity worldwide. The song is considered Cherry’s signature song.On the other hand, ‘Challa’ song is sung by sufi singer Rabbi Shergill , who has first time lent his voice to Shah Rukh Khan for this Yash Chopra 's film. Though Rabbi has sung the song in his own style yet his pitch and tone will also remind you of Cherry’s singing.AR Rahman and Gulzar have teamed up for this Yash Chopra’s last directorial. The song ‘Challa’ has already become a viral on the YouTube like the movie's trailer.Jab Tak Hai Jaan is scheduled to release this Diwali on 13th November, 2012.