Please please please! Help with a song for mother dance

My FH and I are going to dance with our Moms at the same time. Therefore, choosing a song is al ittle difficult. (the things you don't think of when making these arrangements). Anywho...my cousins FW is a singer and she wanted to sing something at the wedding. The song I loved for mother's dance was 'You don't have to Let Go'by Jessica Simpson. Since I am not the biggest Jessica fan I figured she could sing that song. But now no one can find an instrumental version and she said singing over it will sound like ****. Any other song suggestions for the mothers dance? Or should I just use the Jessica version and have my cousin sing something else???