Rihanna signing vinyl albums in the. back of the checker cab When Rihanna wants to celebrate Mother's Day in style, she doesn't call a limo. She calls TheCheckerCab. The iconic singer and mogul was spotted cruising through the streets of New York City in one of our authentic Checker Cabs this Mother's Day — and she looked every bit as legendary as the ride itself. Rihanna has never been one to do things the ordinary way. So when it came time to mark the occasion, she skipped