Oops, fixed the Once on this Island one.
The song from Mean Girls is officially called "World Burn."
I'm (trying) to go by official track listings, so while some songs might have similar titles or part of the listed title (ex: If I Could Tell Her from DEH), the correct answer will be the musical with that exact song. If there are musicals with the same song name though, please let me know and I'll fix it!