Daughter starting gymnastics - should she wear underpants under the leotard or not?

I also have a 5 year old..I would have her wear just the leotard tomorrow then buy her undies that don't stick out special just for cl, later this week..That way she doesn't feel embarred..It is hard to take back an embarring situation for a child..Thankfully at this age they bounce back quick but it's up to us the super moms to make sure everything is perfect for our kids..