Edith Head would be 116 years old today, the only woman to have won eight Academy Awards. She was a well-known costume designer, designing outfits for Hollywood stars such as Grace Kelly and Audrey Hepburn for their most prominent roles.
Here is the logo on Google's home page:
She was born on October 28, 1897 in San Bernardino, California and passed away at the age of 83 on October 24, 1981 in Los Angeles, California.
She has a star on Hollywood Walk of Fame at 6969 Hollywood Boulevard. She has a huge list of actors and actresses she designed for on Wikipedia. She was very well accomplished.
Google posted a higher resolution image of the logo on Google+:
Forum discussion at Google+.