The elder Williams sister swept into the U.S. Open this week with a decisive win and even better hair. See her best looks over the years. Williams applauds her fans after winning her first round match against Kirsten Flipkens of Belgium on August 26. The tennis star showed off her long purple hair, which she pulled back in a braid. Matthew Stockman/Getty Williams serves during a practice session before the 2013 Australian Open as her multicolor hair bounces behind her. Toby Melville / Reuters Multicolor strands were woven into Williams's tight bun during the London Olympics in 2012. Suzanne Plunkett / Reuters Williams, with a closely cropped cut, returns a shot at the Family Circle Cup tennis tournament in Charleston, South Carolina, in 2009. Tami Chappell / Reuters Red, white, green, blue, purple, yellow. Williams hit most of the colors of the rainbow with the beads in her hair during the Australian Open in 1999. Clive Brunskill/Allsport via Getty Williams eschewed beads in favor of a less ornate look during the 2007 Fed Cup tourney. Hans Deryk / Reuters Beads fly as Williams serves during the 1998 Australian Open. Mike Fiala/AP Williams stares down her opponent during the 2002 French Open. Reuters Williams shows her patriotic side with red, white, and blue beads during a semifinal match at the U.S. Open back in 1997. Sixteen years later, she's still got it. Timothy A. Clary/AFP via Getty