Crossfading involves slowly decreasing the volume of the song you are playing and increasing the volume of the next song at the same time. This overlap creates a smooth transition between the two songs and enhances your listening experience - this technique is used extensively by DJ's. If you like listening to continuous non-stop music, then mix like a DJ and use crossfading.
Here's How:
- To Enable Crossfading:
From My Music> Settings 
> Music settings> Enable Crossfading> ON
> Music settings> Enable Crossfading> ON- To Disable Crossfading:
From My Music> Settings > Music settings> Enable Crossfading> OFF
> Music settings> Enable Crossfading> OFF