The Olympic gymnast turned 23 on Saturday, and while she was flooded with well wishes from fans and friends, there was one birthday tribute she didn't enjoy.
In a tweet honoring Biles' special day, USA Gymnastics wrote, "HAPPY BIRTHDAY to the most decorated gymnast of all time, @simonebiles! We know you will only continue to amaze us and make history! ✨???."
Biles fired back, "How about you amaze me and do the right thing… have an independent investigation."
The investigation Biles is referring to is likely about Larry Nassar, the former USA Gymnastics doctor who is serving a life sentence on charges of child pornography and sexual misconduct after more than 150 women and girls -- including Biles -- said he sexually abused them.
Earlier this year, USA Gymnastics offered the victims of Nassar a $215 million settlement -- divided between 517 athletes who have sued the organization -- as part of a plan to exit bankruptcy. Biles has been an outspoken critic of USA Gymnastics, tweeting in response to the settlement in February, "Still want answers from USAG and USOPC. Wish they BOTH wanted an independent investigation as much as the survivors and I do.”