Hopefully not, but if the owner of the drug store doesn’t want any singing, you and your daughter do not have a right to do it as a Constitutional Right.
BTW, many of these restrictions as they apply to public spaces came about during the boom box era and the cacophony of audio assaults that were sent our way. Religious music enjoys no special protection when these restrictions are put in place. On the other hand, you can not single out religious express but allow rap and country music.
Well, no one complained and the one lady actually liked it, so all was well. And I still hear cars blasting rap with profanity, etc. all the time. I guess I should just blast my Casting Crowns.