Rio de Janeiro - Shelly-Ann Fraser-Pryce of Jamaica showed off a spectacular new hairdo during track and field 100m heats and ended up the only woman to break 11 seconds.
The yellow-and-green-haired Fraser-Pryce will be trying to become the first woman to win the same individual Olympic athletics events at three Olympics in a row.
Two others weren't able to accomplish the feat on Friday.
Tirunesh Dibaba of Ethiopia took bronze in the 10 000m and Valerie Adams of New Zealand finished with silver in the shot put.
In the outside lane late on Friday, Fraser-Pryce crossed in 10.96, with Michelle-Lee Ahye of Trinidad and Tobago setting the second best time of 11.00.
All the favorites advanced, with Dafne Schippers of the Netherlands, Elaine Thompson of Jamaica and Americans Tianna Bartoletta, English Gardner and Tori Bowie also winning their heats.
Meanwhile, South Africa's Carina Horn, running in the eighth and final heat, posted the second-fastest time of 11:32.
Horn thus qualified for the third and final semi-final (Sunday at 02:14 SA time).
The first two finishers in each semi-final plus the two fastest others will make the eight-woman final - which is scheduled for 03:37 (SA time) on Sunday.
Horn's team-mate Alyssa Conley finished sixth in her heat in 11:57 and did not progress to the semi-finals.