Yoko Ono brought the Plastic Ono Band to L.A.'s Orpheum Theatre this weekend, playing two nights with guests Sonic Youth, Iggy Pop, RZA, Perry Ferrell, tUnE-yArDs, and Lady Gaga. Gaga did "The Sun Is Down" with Ono, played piano for another song (then laid across that piano with Ono), and joined in on a huge "Give Peace A Chance" jam ...