I love Strongbad; I love his voice and his idiolect, but when he goes falsetto to do the Teen Girl Squad voices it's ... indescribably entertaining.
I love all the installments of Teen Girl Squad, but two stick out as my favorites:
Issue 9: "Cuz now I'm best friends with an olda girl what has her learner's permit!" (This one has a song in it that I just love.)
Issue 10: "The tenthennial extravaganza...in 24 great-smelling colors!"
"Corn is no place for a mighty warrior!"