 O Kadhal Kanmani A. R. Rahman |  Odi Odi Uzhaikkanum Ghibran |  Odu Raja Odu Tosh |  Oh Maane Maane Ilayaraja |  Oh My Kadavule Ashok Selvan, Ritika Singh, Vani Bhojan |
 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 |  Ongala Podanum Sir Rejimon TKL |  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, Gopi Sunder |  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 |
