He is especially poetic in ‘2 the Sky,’ where he creates a pure yet melancholy vibe, one of the few songs that truly shows off his voice. ‘Lost Without U’ displays a raw sound combined with a smoothness similar to that of Usher. Later on, true to the album’s title, Thicke’s vocal range does evolve a little bit as he shows off in a few songs. One noticeable flaw in many of Thicke’s ballads is his tendency to stay in the same range. It’s sad to say that Thicke fails to come up with other material to sing about. However, after listening for some time, many of the songs like ‘Teach U a Lesson’ can become trite and repetitive. Likewise, in another bluesy tune, ‘I Need Love,’ he manages to reveal some of his vulnerability and project a melancholy aura. In ‘Complicated,’ one of the better ballads, Thicke utilizes an upbeat rhythm that makes listeners immediately want to snap their fingers as he croons about relationship problems. The overwhelming number of these tracks should make the album more appealing to women than to men. When listening to Thicke’s album, the first thing to note is the number of ballads in which he has written about love, frustration and anxiety. In fact, ‘The Evolution,’ a combination of ballads and dance songs, is a classic case of de-evolution. Yet the singer/songwriter, formerly known for his guest roles in episodes of ‘The Wonder Years’ and ‘Growing Pains,’ fails to do so. In his sophomore album, ‘The Evolution of Robin Thicke,’ Thicke attempts this type of progression in his music. Evolution is a simple enough theory to grasp: It’s the gradual progression of change over time.