Petrushka isn't a Beatles cover.
Never seen Paul live. It was a setlistprivilege to hear. All the songs that I love as a teen were played and plus Foxy Lady cover were amazing. Paul still sounds amazing in his 70s and was astounded by the performance. Hope there are many more concerts in his future! Long live Paul and the Beatles!
"Maybe I'm Amazed" was originally recorded by Paul McCartney solo on his 1970 album 'McCartney'. His band Wings released a live version in 1977. http://en.wikipedia.org/wiki/Maybe_I%27m_Amazed