The country star received a warm welcome before delving into her hit song "Back to December" to the crowds delight.
The Ellen visit comes just as Miss Swift racked up another honor - as she was selected as Entertainment Weekly's Entertainer of the Year for 2010.
Garnering the title largely due to her successful album "Speak Now," Taylor told press, "Sometimes I would laugh because I would see it in print and it would say, 'This song, which is written about her ex, so-and-so ...' And they would write about it as if it was fact," she says. "The fact is, I haven't ever confirmed that any song is about any particular person. There's something kind of freeing about that. As far as I'm concerned, it's all still up in the air."