Serena has 33 total Grand Slam titles, 18 of those in singles now - starting with the 1999 US Open...
2002 French Open: Serena beat Venus in the final, the first time a little sis beat a big sis at a major.
2002 Wimbledon: Serena beat Venus in the final again, which pushed her to No.1 for the first time too.
2002 US Open: Turning heads with her Catwoman-like outfit, Serena won a third straight Grand Slam title.
2003 Australian Open: Serena saved match points in the semis and beat Venus to finish the Serena Slam.
2003 Wimbledon: Serena beat Venus for the title and stood with first-time major winner Roger Federer.
2005 Australian Open: Serena saved match points in the semis and beat Lindsay Davenport for the title.
2007 Australian Open: Defying her No.81 ranking, Serena stormed to her eighth Grand Slam singles title.
2008 US Open: Serena won the title then returned to No.1 for the first time since the 2003 season.
2009 Australian Open: Serena beat Dinara Safina to capture her milestone 10th Grand Slam singles title.
2009 Wimbledon: Serena saved match point in the semifinals and then beat Venus to capture the title.
2010 Australian Open: Serena became the first player in the Open Era to win five Australian Open titles.
2010 Wimbledon: Serena won the title but then missed almost a full year due to injury and illness.
2012 Wimbledon: She was there for Federer's first major, and she was there for his 17th and most recent.
2012 US Open: Serena made more magic in New York, coming back to beat Victoria Azarenka for the title.
2013 French Open: For the first time in 11 years, Serena conquered her second hometown of Paris.
2013 US Open: Serena beat Azarenka in an absolute grinder for her 17th Grand Slam singles title.
Of Serena's 32 total Grand Slam titles, 13 are in doubles - starting with the 1999 French Open...
1999 US Open: The Williams sisters posed with their second Grand Slam doubles trophy - and their dogs.
2000 Wimbledon: Venus won the singles title then partnered with Serena to win the doubles crown too.
2001 Australian Open: Both players lost to Martina Hingis in singles but beat her in the doubles semis.
2002 Wimbledon: Serena beat Venus for the singles title but they teamed up to take the doubles.
2003 Australian Open: The Williams sisters beat Virginia Ruano Pascual and Paola Suárez for the title.
2008 Wimbledon: Venus and Serena got their first Grand Slam doubles title since Australia in 2003.
2009 Australian Open: Venus and Serena beat Daniela Hantuchova and Ai Sugiyama for the title.
2009 Wimbledon: Another dominant run - they didn't drop a set to win at the All-England Club in 2009.
2009 US Open: Venus and Serena outdid Cara Black and Liezel Huber for just their second US Open title.
2010 Australian Open: And they defeated the Zimbabwean-American duo again Down Under in 2010.
2010 French Open: They completed a non-calendar year doubles Grand Slam at the French Open in 2010.
2012 Wimbledon: The Williams sisters captured their 13th and most recent Grand Slam doubles title.
Serena's first two Grand Slams actually came in mixed in 1998 with Max Mirnyi - Wimbledon and US Open.
As for the trivia - Martina Navratilova had 50 total Grand Slams when she turned 32, finishing with 59.