Most people probably won't even notice but the shirt should say "Let's Go". Those pesky apostrophes. We have a lot of experience with them here at Stahls'.
We all make mistakes and someone at Old Navy made a minor grammatical error that most of the world probably wouldn’t even notice. But the internet doesn’t let anything go unnoticed anymore and so all we can say to Old Navy is…get a heat press and some custom cut apostrophes and offer to add the correct punctuation to anyone who insists on being grammatically correct all the time. That’s the beauty of heat printing. If you mess up, you can usually find a way to correct your mistake. Have a grammatically correct weekend everyone.