It’s been nearly 30 years since Lenny Kravitz released his breakthrough first album, “Let Love Rule.” Since then he has sold more than 40 million albums and at one point won the Grammy Award for “Best Male Rock Vocal Performance” four years in a row. In this week’s “Sunday Sitdown,” Willie Geist talks to the rock star about his long career in the industry and the interesting way he came up with his latest album, “Raise Vibration.”