Ved [[Sommer-OL 2012]] i [[London]] blev hun olympisk mester på 200 meter bryst, hvor hun satte ny verdensrekord i finalen med tiden 2:19.59.<ref>[http://www.london2012.com/swimming/event/women-200m-breaststroke/index.html?v=20120802-194712259 Women's 200m Breaststroke] {{Webarchive|url=https://web.archive.org/web/20210222083411/http://www.london2012.com/swimming/event/women-200m-breaststroke/index.html?v=20120802-194712259 |date=22. februar 2021 }} London2012.com, hentet 2.august 2012.</ref> I semifinalen havde hun også sat verdensrekord med 2:20.00. I 100 meter brystsvømming vandt hun sølv.<ref>[https://archive.today/20121210062328/www.london2012.com/swimming/event/women-100m-breaststroke/index.html Women's 100m Breaststroke] London2012.com, hentet 2.august 2012</ref>
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