Lady Gaga and Tony Bennett made a surprise appearance at Montreal Jazz Festival to perform some songs from their upcoming jazz album Cheek to Cheek. Set list 1. * "But Beautiful" (Duet) 2. * "Lush Life" (Solo by Gaga) 3. * "Sophisticated Lady" (Solo by Tony) 4. * "It Don't Mean a Thing (If It Ain't Got That Swing)" (Duet)