WATCH: Bob Weir, Trey Anastasio Cover Lady Gaga's 'Million Reasons'

Well, that was different.

Bob Weir of The Grateful Dead and Trey Anastasio of Phish paired up on Saturday for a cover version of Lady Gaga’s hit “Million Reasons.”

The unusual rendition of the pop ballad went down at the Wanee Festival in Florida.

The song, which Gaga wrote with Mark Ronson and Hillary Lindsey, is from her 2016 album Joanne.

Weir and Anastasio paired for a short acoustic set that also included Grateful Dead’s “Bird Song,” and Phish’s “Miss You.”

Weir was at the festival with his Campfire Band and Anastasio was in the line-up with his eponymous band.

Check out their cover of “Million Reasons” below: