Need song ideas Asap! Please help!

*Long post warning, but I'm desperate*
Hey all, yesterday morning my uncle (very unexpectedly) passed away. He was my grandparents first born and only son and helped them tremendously as they have aged while living/working on a farm. My grandpa was supposed to walk me down the aisle and do a grandfather/bride dance with me. This is something that I have had planned since I was probably in middle school (my father hasn't been in my life since elementary school, but that's beside the point). With the passing of my uncle, my grandparents told my mom they would not be able to make the wedding - my grandpa is completely broken by this, and started crying when talking to my mom and asked if he could still have the tie we got for him as a souvenir. (Which, breaks me, but am not letting them know)...
Anyway, my brother-in-law has offered to walk me down the aisle if grandpa doesn't change his mind and doesn't come - my grndma already wasn't sure because she ison oxygen, and my uncle was going to be in charge of making sure she had enough, but grandpa still may change his mind, but I am trying to plan just in case... I want to surprise my brother-in-law by having a dance with him at the reception in place of the dance I was going to do with my grandpa. If you have any suggestions for a song for a brother-in-law/bride dance, I am drawing a complete blank.
Sorry for the long post, but thank you for any help!