App performance if an item is linked to many users


I have developed a meditation app. I have a collection for Users and another for Songs.
I would like to add a new feature: showing for a specific user the last song he listened to.

In order to do that, I was thinking for each user to add in database the last song they listened to.

If for each user in database I add the last song they listened to, it means a specific song could be linked to dozens/hundreds of users → would it be a problem regarding the performance of the app?

Thank you in advance!