Sure, Selena Gomez is one of the most followed people on Instagram and the vocal celeb behind the new No. 1 album Rare. But her own fame hasn’t stopped her from fan-girling over others in her industry — especially Jennifer Aniston. Aniston served as guest host on "The Ellen Degeneres Show" Thursday — when, lucky for Gomez, she made an appearance to chat about her latest album. But the 27-year-old couldn’t help but gush over Aniston while expressing her love for "Friends," recalling the first time that she’d been in the same bathroom as the actress, who played Rachel Green on what Gomez called the “iconic” show.