 O Kadhal Kanmani A. R. Rahman |  Odi Odi Uzhaikkanum Ghibran |  Odu Raja Odu Tosh |  Oh Maane Maane Ilayaraja |  OM N.R.Ragunanthan |
 Onaaigal Jakkiradhai Adheesh Uthriyan |  Onaiyum Aatukuttiyum Ilayaraja |  Onbadhu Roobai Nottu Bharathwaj |  Onbathu Kuzhii Sampath V.A. Charlie,Sunil Xavier | |
 Once More Deva |  Ondikatta Bharani |  Ondikku Ondi Deejay Gan |  Ondraga Originals Karthik |  One Love A. R. Rahman |
 Onnume Aagala - Album Anirudh Ravichander |  Oomai Ullangal Ilayaraja |  Oomai Vizhigal Manu Ramesan |  Oorellam Un Paattu Ilayaraja |  Oorkavalan Sankar Ganesh |
 Ooru Vittu Ooru Vanthu Ilayaraja |  Oram Poo G. V. Prakash Kumar |  Orange Mittai Justin Prabhakaran |  Ore Oru Gramathiley Ilayaraja |  Ore Oru Raja Mokka Raaja Suman Bichu |
 Oru Adaar Love Shaan Rahman |  Oru Cup Tea - Album Tea Kada Pasanga |  Oru Kadhai Sollatuma Rahul Raj |  Oru Kadhal Seiveer Bharani | |
 Oru Kaidhiyin Diary Ilayaraja |  Oru Kal Oru Kanadi Harris Jayaraj |  Oru Kalluriyin Kathai Yuvan Shankar Raja |  Oru Kanavu Pola E. S. Raam |  Oru Kanniyum Moonu Kalavanigalum Natarajan Sankaran |
