See Tiffany Haddish twerk while chanting “Hava Nagila” in E! News’ exclusive sneak peek at NBC’s Joan Rivers: A Dead Funny All Star Tribute honoring the late comedy icon 10 years after her death. Can we talk about Tiffany Haddish‘s Hebrew skills? “This isn’t a funeral, guys, it’s a celebration, alright?” Haddish tells the live…