Examples of Singing: "Erase Me," "Day 'n' Nite," "All Along"
Kid Cudi has always had a style of his own. For almost all of his music, you can make the case that he's both singing and rapping, at the same time. He's a consistent fan of harmony and melody, but his lines are always delivered with the inflection and intensity of a rapper.
Conclusion: No matter how the vocals come out, Cudi's a rapper at heart, but more than anything, he comes across as a full-fledged artist without limits.