In an interview with Rolling Stone, Rockstar's SoundTrack Supervisor, Ivan Pavlovich, stated that the game would include fifteen radio stations, two talk radio stations, 240 licensed songs and about 20 movies worth of scores, in their largest soundtrack ever.
We have 15 radio stations, two talk radio stations, 240 licensed songs, and somewhere in the proximity of 20 movies worth of score. It's the largest soundtrack that we've done, and the largest score that we've done.
For this game, which is set in our version of modern day Los Angeles, what was important for us was to capture that feeling of L.A. and California. We approached the radio stations as the musical soundscape [you experience] as you fly into L.A. One of the things we've never done in a GTA game before is a pop station; exploring that made so much sense in the context of L.A.
We reported earlier that the soundtrack for Grand Theft Auto V had been leaked onto the internet when the unencrypted assets had been mined from the files that players who pre-ordered the game could download prior to the release of the game.