DALY CITY, CA - APRIL 24:  Donna Otis, general manager of the Lake Merced Golf Club, gives an 18th birthday cake to Lydia Ko of New Zealand during round two of the Swinging Skirts LPGA Classic presented by CTBC at the Lake Merced Golf Club on April 24, 2015 in Daly City, California.  (Photo by Robert Laberge/Getty Images)