LOS ANGELES  - R&B singer Rihanna shot straight to the top of the Billboard 200 album chart with her seventh record “Unapologetic,” scoring her first No 1 album despite mixed reviews. “Unapologetic,” which topped iTunes charts in 43 countries just hours after its release on November19, sold 238,000 copies according to Billboard, scoring the 24-year-old singer from Barbados her best opening sales week to date.