My mil Doesn't Like my Wedding Song

Hey Ladies, so my FH's niece is singing a song for me to walk down the isle. I chose this song because the words are very moving to me and say exactly what I want my FH to hear as I walk to him. My MIL heard the song because his niece was playing it to practice singing it. So MIL calls me last weekend to tell me she doesn't like the song. Long pause on the phone because of course I am cussing in my head and saying to myself "This isn't your wedding". Then she begins to tell me that she is going to send me some other songs that I "NEED" to choose from and one of them that she love so much is the song that his brother had at his wedding last February. I have not spoken with her since that day. We have a pretty decent relationship but I am upset by what she said, but mostly THE WAY she said it. It not like I asked her for her opinion. FH said that I shouldnt worry about what his mom thinks becuase it is not her day and to not be upset. Am I over reacting?