TMZ.com: A$AP Rocky and Rihanna Celebrate Mother's Day After Icy Met Gala - A$AP ROCKY AND RIHANNA STEP OUT FOR MOTHER'S DAY DATE Following Icy Met Gala Outing - MOM'S NIGHT OUT - A$AP Rocky and Rihanna celebrated Mother's Day with a night out in NYC ... days after a what appeared to be a tense Met Gala outing.