It wasn’t a surprise, but when Taylor Swift showed up at a James Taylor show this week to play with one of her musical idols, it certainly was a treat for fans of both artists.

This past Monday (July 2), during a show at Tanglewood outside of Boston, the Berkshire Eagle reports that Taylor Swift (whom the paper describes as a “rapidly rising” artist) took the stage twice during the elder Taylor’s two-hour, hit-filled set. First she sang a duet on the James Taylor classic “Fire and Rain,” which she’d previously sung when James appeared during her set at Madison Square Garden last fall (which was a surprise to fans).

“Hours Of Time On The Telephone Line.” viddy.it/Og0Vam — Taylor Swift (@taylorswift13) July 3, 2012

Swift then returned during the second half of James’ two-plus-hour show to sing two of her own songs, “Ours” and “Love Story.” Swift’s friend Roxy Olin tweeted a photo of her friend backstage:

@taylorswift13 getting ready for stage twitter.com/roxyolin/statu… — roxy olin (@roxyolin) July 3, 2012

James Taylor harmonized on the choruses of Swift’s songs and accompanied her on guitar. The site Masslive.com also reports that Swift at this point explained the idea for her appearance had been hatched when James had joined her last fall at Madison Square Garden.

TAYLOR/TAYLOR instagr.am/p/MmX8doAmF4/ — Claire Kislinger (@ClaireWinter) July 3, 2012

So, what plans do you think the two Taylors hatched this time? We can only wait and see.

- Kurt Wolff, CBS Local