According to legendary songwriter Diane Warren (via Twitter), Lady Gaga "outsings just about any singer in pop music" during vocal exercises. In fact, "an all-time classic was born!" when they hit the studio over the weekend. Never could imagine Gaga singing a Diane Warren song, so this should be interesting! Warren hasn't penned a "memorable" song in recent times, so I'll take that "classic" statement with a pinch of salt. Warren, who has written many Grammy nominated smashes, has worked with Beyoncé, Toni Braxton, Aaliyah, Cher, Tina Turner and Whitney Houston to name the few, so her resume is pretty iconic.