Serena has 36 total Grand Slam titles, 21 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.
2014 US Open: Serena tied Chris Evert and Martina Navratilova with a whopping 18 Grand Slam titles.
2015 Australian Open: Serena surpassed Evert and Navratilova with her 19th Grand Slam title.
2015 French Open: Serena won her third straight major - and 20th overall - at Roland Garros this year.
2015 Wimbledon: And then her fourth straight Grand Slam title - a second Serena Slam - at the All-England Club.