J.M.J. Saint John Paul II (1978-2005) often recited the prayer entitled, Totus Tuus, which is closely connected to the "perfect devotion" to Our Blessed Lady inspired by Saint Louis Marie Grignion de Montfort (1673-1716).
Totus tuus ego sum,
et omnia mea Tua sunt.
Accipio Te in mea omnia,
praebe mihi Cor Tuum, O Maria."
"I am totally Yours,
and all that I have is Yours.
I accept You in all that I have,
give Your Heart to me, O Mary."