- Now I'm High, Really High by Three 6 Mafia prod. by DJ Paul
- Now I'm Hi (Pt. 2) by Koopsta Knicca (Ft. Gangsta Boo) prod. by DJ Paul
- Now I'm Hi, Pt. 3 by Three 6 Mafia (Ft. Playa Fly) prod. by DJ Paul
- Oh Gee La Freestyle by Wiz Khalifa (Ft. Lola Monroe) prod. by Salaam Remi
- OH MAN by Yamine prod. by Bass Beats
- Oh No by Gangsta Boo (Ft. Hussein Fatal & Tear Da Club Up Thugs) prod. by DJ Paul
- Oh Well (Remix) (Ft. 2 Chainz) prod. by Lex Luger
- Old Triple Six
- Ol Skool prod. by CuBeatz & TM88
- On Da Scene Wit Da 45 Glock by DJ Paul & Juicy J prod. by DJ Paul
- One Hitta Quitta by Three 6 Mafia prod. by DJ Paul
- One Life 2 Live by Kingpin Skinny Pimp (Ft. Three 6 Mafia) prod. by DJ Paul
- One Minute prod. by Tarentino
- One of Those Nights (Ft. The Weeknd) prod. by DannyBoyStyles & The Weeknd
- One Thousand (Ft. Wiz Khalifa) prod. by Recollect
- Only One Up prod. by YK808
- On Me by K Check (Ft. Kevin Gates & Problem) prod. by Trendsetterz
- On & On (Ft. Belly & Tory Lanez) prod. by Ben Billions, DannyBoyStyles, Mel & Mus & R. City
- On the Way by Juicy J, Wiz Khalifa & TM88 prod. by TM88 & YEEZY808
- Ooh Nuthin' by Project Pat prod. by DJ Paul