JUST IN: Taylor Swift attends birthday party without Travis Kelce.

Barney’s Beanery patrons weren’t ready for it.

Taylor Swift was spotted at the West Hollywood bar Thursday night celebrating a friend’s low-key birthday bash.

The Grammy winner, 34, sat in a booth with her pals, according to photosTMZ obtained these photos and videos of Taylor’s West Hollywood outing Thursday night.

Check it out … Taylor and one of her buddies rolled into Barney’s Beanery, joining about 7 other people in a booth near the windows.We’re told Taylor was sitting with a bunch of older folks as well as some younger people – while trying to keep a low profile.

But that’s impossible when you’re an international pop superstar in a public place so everyone obviously recognized Taylor, yet no one came up and bugged her.Our sources tell us … Taylor spent about two hours at the soiree before saying happy birthday to one attendee, sliding out of the booth and leaving the restaurant.