Does skipping songs use more data on iPhone using Spotify or Pandora radio?

I have a limited data package on my iPhone and I'm trying to figure out if, while using Spotify or Pandora radio, skipping songs will use more data per minute than just listening to the song straight through. In other words, if I listen to 10 songs but only listen to 1 second of each song is that using the same amount of data as it would be while listening to 10 seconds of 1 song? Or does the phone download the whole song at the beginning so listening to 1 second uses the same data as listening to the whole song? Please only answer if you know what you are talking about, thanks!

Surely, any streaming app would have some sort of read-ahead buffer. This allows the music to be played without skipping and stuttering. The buffer would not be so large as to download an entire song.

To answer your question, skipping songs uses less data than listening to entire songs.