Is there a better way to celebrate your 26th birthday party than with a throwback roller skate disco party?

How about if your new BFF Katy Perry joins you?

Perry was seen partying it up with country star Kacey Musgraves, as Musgraves shared on Instagram photos and videos from her awesome disco-themed 26th birthday party. Musgraves celebrated her birthday with friends and bandmates at a roller skate rink called Skateville, located in Burnsville, Minn.

Musgraves and Perry are touring together, and are scheduled to perform at Minneapolis, Minn. tonight, Aug. 22.

Wearing bright neon colors and lights, Musgraves and Perry appear to be enjoying themselves like young teens again. Check out some of Musgraves' photos and videos below!

Birthday checklist in place!

Kacey gets her skate on!

Kacey shows off her moves under the disco ball

Nice shoes!

That cake...

See Katy Perry + More Celebrities' Yearbook Photos!