Songs for my Grandparents?

Hey guys, so my grandparents 70th anniversary is coming up, and my family has been chosen to be the "band" so to speak, for their anniversary party. I need 3 amazing songs to sing for them. I already have two: "Something Holy" by Stellar Kart and "In Christ Alone." They are devout Christians. I am in need of one more song to sing for them, but I'm running out of ideas. If you guys could give me a few sweet songs, or even some inspiration, I would be so happy! Thanks guys! By the way, check out that song "Something Holy." It's freaking amazing.