Checked out "The Insecure Single Girl"......
I think I know what you mean, there's something "not quite right" with the mix - things aren't sitting properly. Musically, on the other hand, things are very solid. Let's take it step by step....
(1st pass) - On the surface everything seems ok, bass is round and solid. Vocal seems appropriately clear. OK here we go (2nd listen thru)... Synth pads sound a bit artificial - the opening wave, and also the washes during the tune... Piano - somewhat indistinct, almost as if you weren't happy with the track (sample?) and tried to bury it in the mix to hide it a bit. Tracks either have to be heard where they're supposed to be or get rid of them - burying them a bit back just muddies things up. (3rd listen)... ok, the things that bother me - everything seems way too squashed - the piano has no attack, and the sax solo doesn't have any dynamics (it's supposed to be solo time - let it shine thru!!!) Also - your vocals tend to get hidden in the mix at times and is appropriate at other times - and yet, there's too much overall compression on them!
Overall - nice tune! All the tone is there - nothing is missing as far as clarity or bottom end, so there's nothing to change with those aspects... I think the biggest problem is overcompression on just about everything, resulting in very little dynamics to grab the listener's attention. Ride the gain manually a bit for your vocals to bring them out at the places in the mix they seem to get buried under.
Let that sax show a bit of peaking too! Musically, the tune is down, except for what appears to be a minor timing error in the piano at 0:43 into the tune... not immediately noticeable though. Great voice Shaky!
Hope this helps...
Bruce Valeriani
Blue Bear Sound