I don't know the Pink song, so it's hard to say how effective it was. "I Believe In Spring" didn't work for me. A real accompanist would have followed you and the phrased around the spaces in the melody much better.
"What You Doing" was much more successful. Also EZKeys? The soloing is busier than what I would do, but that's just a matter of taste. The strings are real...I hope? Nice arrangement. The only thing that would make it better would be MORE strings!
"I'll Wait For You" was very nice. The overall vibe reminds me of Steve Tyrell.
Diggin' it.