Prince achieves his first career No. 1 debut on The Billboard 200 this week with his new NPG Music/Universal album, "3121". The set sold 183,000 copies in the United States, to open at No. 1 on the big list, as well as on Billboard's Top R&B/Hip-Hop Albums tally. "3121" is his fourth chart-topper on The Billboard 200 and first since 1989.