This article is a Stub. You can help Blue Bloods Wiki by expanding it. Tony Bennett guest starred as himself in the first episode of Season 2, Mercy. In the episode he performed with Carrie Underwood (as herself), singing a duet for a fundraiser that Frank and Erin attended. Retrieved from "https://bluebloodstv.fandom.com/wiki/Tony_Bennett?oldid=13981" Categories: Stubs Cast Special Guest Star Community content is available under CC-BY-SA unless otherwise noted.