Lady Gaga is a mega-star. She's one of very few actual "artists" that exists in the music world. She's eccentric, eclectic, and, let's face it, effing weird. Which is why 30 Seconds to Mars loves her. This is why they performed a  cover song of one of her early hits, "Bad Romance." While not as "catchy" as the original,  this version is especially haunting,  and really makes you listen to the words being sang.