As if seeing Taylor Swift in concert isn't cool enough! Wednesday night (8/26), the 'Bad Blood' singer welcomed Lisa Kudrow to the stage, instructing the Los Angeles audience to go easy on her guest, as she'd previously only sung in coffee houses, not huge venues such as the Staples Center.

"You guys, make her feel welcome, her name is Phoebe Buffay!"

The 'Friends' star then jokingly instructed Taylor to "feel the lyrics" as they recreated 'Smelly Cat,' Kudrow's character's Central Perk anthem.