ARTthrobs: Donna Summer, 'American Idol,' John Travolta, Justin Bieber, 'The Bachelorette'

This week on ARTthrobs, Alex and Sarah talk about Donna Summer's death, Jennifer Lopez possibly leaving "American Idol," Britney Spears and Demi Lovato joining "The X-Factor," a Justin Bieber profile in GQ Magazine , John Travolta's alleged sexual assault cases, "The Bachelorette" Season 8 premiere with Emily Maynard, upcoming local events and zombies taking over New York City.