Jessica Ennis grabbed gold for Great Britain at the World Athletics Championships in the heptathlon.
The 23-year-old smashed her rivals after leading the seven-event competition right from the start.
Ennis sealed the win with victory in the final event - the 800m - and won by a big margin of 238 points in Berlin.
After winning Ennis said: "It's been the longest two days of my life but the best. I can't believe it. I'm the world champion, I feel like crying."
In the heptathlon female athletes compete in seven events, split across the track and the field, and score points for how well they do each one.
Ennis won three of the opening four events, forcing all her rivals to try to catch her, but none of them could, as she finished on 6731 points.
Former Olympic champion Denise Lewis is the only British athlete to have scored more points than Ennis in a heptathlon.
The win was even more special for Ennis as she couldn't compete in the Olympic Games in Beijing in 2008 because she broke her ankle.