His name is Ed Sheeran. He's a ginger British singer-songwriter who's made guest appearances on her album "Red" and performed with her. According to reports, she's now "spending the night with him:" Take it away, E Online:

The red-headed singer who has collaborated with Taylor in the past may have been doing a different kind of collaborating after they 'stayed in (her) room, just the two of them, until around 4am.'
A source told the publication that when the singer/songwriter left her room he looked 'very happy'.

Apparently after their rendezvous, Taylor got her driver to take Ed away in the car she had used earlier in the day. 'He looked very pleased with himself.'

So... Second base? Bros of the world, time to step up your game. How long until there's a song about him?

Gifs via Tmz Tumblr.