Simone Biles dominated the competition in Rio wearing sparkly eye makeup and even more sparkly leotards.
Michael Phelps was all business when he won five golds and a silver in Rio.
That brings his career total to 28 Olympics medals — 23 of them gold.
Kerri Walsh Jennings is known for her trademark braid and visor on the beach volleyball court.
Monday night marked Walsh Jennings' first-ever loss in Olympic beach volleyball. Luckily, she and teammate April Ross still went home with the bronze medal.
In Rio, Aly Raisman won a gold and two silvers wearing her hair in her signature bun.
Fun fact: One of the tumbling passes in her medal-winning floor routine is so difficult it was once considered impossible.
At the Rio pool, Katie Ledecky won four golds and a silver, broke world records, and generally kicked ass.
In the 400-meter freestyle, she was celebrating breaking the world record well before the other swimmers even finished.
In Rio, Chinese swimmer Fu Yuanhui became an Internet sensation for her overjoyed reaction to winning bronze in the 100-meter backstroke.
In fact, many psychologists say that bronze medalists are happier than silver medalists.
Team USA's Ashton Eaton pushed to finish the 400 meter race in men's decathlon. (He's the defending gold medalist in the sport.)
A few days earlier, he wore casual clothes to cheer on his wife, Canadian heptathlete Brianne Theisen-Eaton. (Note the Canada hat!)
The Eatons are just one of 15 adorable power couples competing together at the Olympics.
Simone Manuel made history in Rio, becoming the first black woman to win a medal for an individual women's swim event.
See her priceless reaction when she found out that she won.