Who knew Vince Vaughn could carry a tune? Turns out, the actor’s been singing right under our noses for years, from the ironic Alanis Morissette cover he delivered in “The Internship” to his cringy rendition of “All the Gold in California” in the movie “Arkansas,” but it wasn’t until “Easy’s Waltz” that it became clear Vaughn could’ve been a crooner in another life.

“Easy’s Waltz” is like a window into that life, and maybe a sigh of relief that the “Swingers” star took a different path — since he’s certainly had it easier than his character does trying to sustain his career as a cabaret act. Vaughn plays Lew Evans, whose friends call him “Easy.” He’s like a laidback Dean Martin who never got discovered, despite regular appearances at one of Las Vegas’ decaying older venues, where he sex

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