It looks like everyone had to bring someone out for their set at FYF Fest over the weekend. For Tame Impala, it was Lady Gaga. She joined the band on stage as they were finishing up their performance to play their song, 'New Person, Same Old Mistakes,' from 2015's incredible album Currents. Watch footage below and prep for their collaborative song 'Perfect Illusion,' which should be out in September.