With a debut single called "Sexual Vibe," there's no question that Stephen Puth is hot stuff. The 25-year-old singer may be the younger brother of singer Charlie Puth, but he is not in anyone's shadow. Stephen is making a big name for himself in the music world, and his Instagram is heating up along with him. It's filled with shots of him doing what he does best: strumming on a guitar and celebrating his music. The good news for fans is that Stephen looks as good as he sounds, and his Instagram is filled with the photos to prove it.