This performer – Larry Gates – sings most of his songs at the genre of rock and sometimes in Caribbean style (for instance, rumba). He has a remarkable voice. Because of that, he does so many voice transitions, and also sings both on the low and high notes, and shows it in almost every his song. This melody of the rock genre has turned out very measured (though a bit of post-processing lacking, which would make the sound smoother).
Reference:"Dumb and Dumber To" Soundtrack List