Well, most “artists” do these days. It’s actually part of the signature vocal sound for young pop and rock acts. Before you think I am being like Dr. Righteous from Mr. Roboto, I’ll be the first to admit any vocal tracks I record need them. 
Why bring it up? I was sharing my love for well crafted songs sung by tenors with Mr. Boghos via email youtube links today and I ended up here: 10CC’s The Things We Do for Love. Pitch correction did not exist in 1977 but listening to all these parts, you’d think it did. The vocals are spot on and a joy to listen to. I hope you like it as much as I do. Unfortunately, I can’t embed it due to copyright concerns.
