Ok, so I am a HUGE fan of soothing Trance music featuring a female vocalist...it helps me relax and feel good, especially when I'm doing classwork and things of that nature. Here's a few examples:
I was never that into trance (more of a 90s eurodance techno listener myself), so I can't name any artists or songs off the top of my head. Check out di.fm , they have a ton of various techno channels (including a vocal trance one), that can help introduce you to some new artists or songs. Good luck in your search!