Yesterday Lady Gaga accidentally tweeted that she will be singing the theme song of Final Fantasy Versus XIII! Anyway it didn’t take a long time until she deleted her tweet, but we were lucky enough to take a print screen to share this with you.
Later today we contacted Gaga’s manager and she confirmed that Gaga will be doing the theme song. We made a “little” contract with Haus of Gaga and now we could bring the FULL VERSION OF THE THEME SONG FOR U! (Instrumental thou) The song will be called as “The Tragedy of Our Hearts” and Lady Gaga has fully composed it by herself.
Final Fantasy Versus XIIII News 
Even though I know this is april fools …the song is pretty ok tbh xD is it a real song or one you guys made ? ^^
I sure hope it’s just a joke.. :p
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This is just the ending theme from the anime; THE MOOMINS.