Does Anyone Know of Some Good Inspirational Songs with Lots of Harmonizing?

My mom and I want to sing a song in church and need a good one! My mom likes to harmonize so if you could find one that had some nice melody I would really appreciate it! By the way, thank you so much to everyone who answered my question about teaching! It really helped!

Suggestion:

I'm a Christina Aguilera Fanatic soooo you could do her songs:
Soar
Beautiful
Lift Me Up

Or Carrie Underwood:
Temporary Home
Play On
Lessons Learned
Whenever you Remember

Hope that helps =) i love all those songs