10. Bruno Mars
Twitter Handle: @BrunoMars
Twitter Followers: 15,881,895
Facebook Likes: 32,704,778
Fan Base Nickname: Hooligans
Best Fan Account: @BrunoMarsFans
Craziest Fan Moment: Rumor has it that Bruno's girlfirend Jessica Caban was slandered by the #Hooligans when she first began dating Bruno.
Bruno Mars is a young heartthrob, and yes, his fans are aware of that. They wait with baited breath for him to release new music, new photos—just about anything. And he returns the love, like earlier this year when he took a fan to her prom on The Ellen Show.