Oh, I know. It makes much more sense that it be a Boston reference, and yeah, the whole ep was about being there, and the character, Jack, is *from* Boston, but...
Well, she really does look like this kid. :-)
And it's not unusual these days for shows to makes references to other networks' shows. (Haven't we had two+ weeks of Leno jokes on every late nite talk show there is? [g] )
But, you're right - it makes more sense that it's a Celtics reference.