OH-YO! Wooster Celebrates 2nd Birthday! December 13! Submitted by OH-YO Frozen Yogurt on Mon, 12/08/2014 - 5:59pm OH-YO! Wooster is celebrating it's 2nd Birthday on December 13th, 2014!Tags: OH-YO! Frozen YogurtOhyoFrozen YogurtIce Creamfrozen yogurt woosterOHYO frozen yogurtfreelive musicOH-YOlive music wooster