Taylor Swift nearly just had an awkward run-in with her ex John Mayer! On Saturday, the We Are Never Ever Getting Back Together singer attended Paul McCartney's concert at the Fonda Theatre in LA... but she wasn't the only celeb there for the show. In photos obtained by TMZ, Tay Tay can be seen chatting it up with Olivia Rodrigo and pals while her ex John is doing the same with other concert goers! OMG! Related: ALL Taylor Swift & Travis Kelce's Cute Moments At The iHeartRadio Music Awards! The outlet reported Taylor kept her distance and later made a break for it out a separate exit than the...