I have listened to Édith Piaf's Johny tu n'es pas un ange and she says
Toi, te souviens-tu de moi.
What is -tu?
BTW, I do know what tu is, but not -tu, and have not found it on Google, perhpaps it does not count the dash (-).
I have listened to Édith Piaf's Johny tu n'es pas un ange and she says
Toi, te souviens-tu de moi.
What is -tu?
BTW, I do know what tu is, but not -tu, and have not found it on Google, perhpaps it does not count the dash (-).
Se souvenir is a reflexive verb. Two pronouns are used, they represent the same person because in such verbs, the subject acts on themselves.
Je me souviens (literally: I remind myself)
Tu te souviens
Il/elle/on se souvient
Nous nous souvenons
[...]
In the interrogative form, the subject pronoun is inversed but not the object one:
Me souviens-je de... ? (rare)
Te souviens-tu de... ?
Se souvient-il/elle/on de... ?
Nous souvenons-nous de... ?
[...]
Finally, Toi is used in the sentence to emphasize the fact she is talking to Johnny, so toi, te and tu all refer to the same person.