Fun.

[Mark Zuckerberg]

An awesome band who most people havent heard of, but deserve more credit. They have three members, Nate Ruess
Jack Antonoff and Andrew Dost, and write awesome music.

[Britney]

An indie pop/rock band based in New York. The members are: Nate Ruess (from [The Format]), Andrew Dost (from Anathallo) and Jack Antonoff (from [Steel Train]), there are some touring members too (Jon Goldstien, Rob Kroehler, Nate Harold, Maggie Malyn, Emily Moore and Michael Newstead).
They have one full length album, 2009s Aim and Ignite.
They have toured with Jacks Mannequin and [Paramore].
Their current label is [Fueled by Ramen].
Their name is usually styled as fun. but sometimes just Fun.