for the most part, the vocal tracks stayed below -13 or -14 but there were a few strays that went up to -10 or -9...I took care of them with hardlimiting rather than compression. It sounds like you tracked it with compression because there I can hear a little bit of "pumping" towards the beginning of the tracks. I dont know what plug-ins you have either so I used factory CEP/AA Quick Verb on one track and Waves Rverb on the other.
I scouped out the MP3 track a little...less than 3db, from 2khz to 6khz to make the vocals sit a little better. Also, I ran AA's noise reduction on the vocal tracks, the main track needed it worse than the doubled, but i used it on both.
Im just going to send you the session file back. All of the effects should still be applied since you already have the tracks. The only ones that may not work the same are the Rverb if you dont have waves plugins and the hardlimiting that i did was not in multitrack view...I did it in edit view but you can do that too if you want. Just hard limit the track to -14. Make sure your "boost input by" is at zero. I left the look ahead and realease at 20 and 50.