Eg Of inspiration..
--- Make a song with 'Billie jean' bass beat but completely different tune or melody.
---Use rap beats( similar to english songs) to enhance the songs,,whose melody and tune itself is original. YSR seems to be doing this a lot.
Eg of Copy..
---Use and retain the exact melody or tune ( or composite tunes from different no s) of previously recorded songs.
Deva and his son has done this a lot.(surely no arguments here )
There is another type of Copy - which is using the tune of previously recorded tune/melody, and camouflage it with extensive and innovative music arrangement. HJ and ARR are very good in this department.
Listen to KAKA- KAKA 1st no - uyirin uyiray..see how he plays and manipulates the famous Sting song. Well maybe we should call it 'subtle' copy.
Honestly I dont find many ARR's songs which are subtlly copied . However I know for sure the song from Padaiyappa - Vetri kodi katte- its tune is exact copy of and english no. ( sorry cant recall the name)
So we can sum it up.----------- All three of these guys ARR, HJ and YSR ,are somewhat guilty in a way by getting inspirations and little bit of 'copying ' here and there.