I'm thinking the Bottom 3 will be Ace, Bucky and Lisa.
Katharine has a beautiful voice, but she faltered big time on her song, both at the beginning and end.
Chris....well, I just hated his song! He could have chosen a song with more variety to it....it basically sounded like a bunch of noise, even though the guy can obviously sing.
Ace has been a favorite of many females, but the song he chose was not sung well at all, no matter how much he felt connected with it.
I won't comment on ALL the singers, but I do feel Mandisa has the strongest voice and has a big chance of winning this AI.