Michelle Obama is going to attempt to break the Guinness World Record for the most people doing jumping jacks in a 24-hour period.
Next Tuesday, the First Lady is hoping to get more than 20,000 people around the world to do jumping jacks for a minute.
She's going to be hosting a bunch of kids on the South Lawn at the White House, but she needs more than 20,425 people to jump along to break the record.
Will you be jumpin' around? Maybe this song will help motivate: