M.P.
When my brother was in kindergarten he LOVED Vanna White. He even made my mom send her an invitation to his birthday party.
I think it is just an innocent kid crush. Something you will be able to taunt her with when she is older :-)
If it continues, just make sure Adam isn't bothered by it. How old is he (I am not familiar with the team)? If he is older, I am sure he is used to girls chasing after him and he might appreciate the innocence of a child's crush :-) I wouldn't worry about it...