Aviva For Certain was unshown due to injury and is a full sister to one of the greatest show horses in AQHA history, A Certain Vino, he was and still is the gold standard of modern-day show horses! Aviva is also a full sister to Potential Diva, a World Champion in her own right. Aviva For Certain is already a World Champion producer and produced multiple big-time show horses, with a list that grows yearly!