Valentine's Day Grudge Match

It's an all out brawl this Valentine's Day at Clyde C. Crashcup Elementary, but who's to blame now? Of course, Alvin for always pulling pranks on Brittany ever Valentine's Day during their dates, Brittany for finally turning him down after learning her lesson, and also a surprise transfer student who can't help but make everything between the two love birds much, much worse off!