Taylor Swift Takes Over ‘Late Show’ to Perform ‘Welcome to New York’ and Proclaim Love to Lena Dunham (Video)

The pop singer also explains why she hasn’t written snarky songs about ex-boyfriends recently

Last Updated: October 29, 2014 @ 9:39 AM

Taylor Swift appeared on “The Late Show with David Letterman” on Tuesday to promote her new hit album, “1989,” and she had a lot to talk about. And sing about.

Between her friendship with “Girls” creator Lena Dunham, her lack of “lousy boyfriends,” the screening process for her famous house party “secret sessions” and her love for New York City, Letterman never needed to dig too hard for conversation topics.

See photos: Party Report in Pictures: Taylor Swift, Katie Holmes, Kellan Lutz, and ‘The Expendables’ Muscle in on Hollywood

Then she got out of the chair to perform one of her new songs (above), “Welcome to New York.”

Basically, Tuesday night’s episode of the CBS late-night program belonged to Swift.

In case you’re curious how one of the music industry’s biggest “it” girl became besties with one of the most successful “Girls” on television, they have Twitter to thank.

Also read: Taylor Swift’s ‘1989’ Expected to Shake Off Competition, Sell 1 Million Copies in First Week

“I went to her Twitter, and the first thing I saw was her quoting my lyrics. And at first I thought, she has to be doing that ironically. Like, she’s clearly making fun of it,” Swift said. “It turns out, she was following me and it was completely unironic and she actually liked my music.”

Several direct messages later, they’re two of the most famous friends in all the land.

Watch all the Swift segments you want, below:

Swift explains how she became the Big Apple’s Global Welcome Ambassador:

Swift explains how she became BFFs with Dunham:

Swift explains why she hasn’t written snarky songs about ex-boyfriends recently:

Swift explains the screening process for inviting fans to her home: