Grammar Folks - help me!

[3blackcats]

I am ordering a t-shirt.
Is it
"Grandpa's Lucky Hockey Shirt" (I think this is right)
or
"Grandpas Lucky Hockey Shirt"
or something else?

Pregnancy brain is making this more difficult then it should be, sigh....

[new_mommy25]

apostrophe, because it is possessive.

[3blackcats]

Thank you!

[momof2girls]

Yep, the first is correct