Hello
I dunno If I can share this info but while I was watching Is Pyaar Ko Kya Naam Do today during Dadi and Garima confrontation ( Telly Nagari - YouTube HQ Part 2 at 6:27)
They played Arjun's tune...
I paused the video and heard it afain..
Here is the link
http://www.urlremoved/tvplay/yplay.php?docid=-9nG5N67yPA
Confusion or is that tune used before as well.??