Lena Dunham Sings at Fun. Concert (Video)

Lena Dunham DGA 2013

Lena Dunham had plenty of fun in Boston on Saturday night.

Bundled up in a hoodie, the Girls creator watched boyfriend Jack Antonoff’s band fun. at the Boston Calling Music Festival, where she sang along from the front of the crowd. Dunham posted a photo of herself from the show on Instagram, writing: "Dear Boston, you were the best Fun. audience I've been in yet. You are lovely, Boston. And loud. Love, the creep in the white hoodie."

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According to People, fun. singer Nate Ruess told the audience "this is the biggest crowd I've ever seen" and "this is the best night of my life."

Watch fun.’s performance of “Some Nights” from the concert below.

Editor's note: An earlier version of this story incorrectly stated Dunham sang along from onstage.