Mariah Carey is clearly enjoying herself in Las Vegas - she has added nine dates to her residency at The Colosseum at Caesars Palace, including a Valentine's Day (14Feb) show next year (16). The R&B diva started her run earlier this month (May15) and following a health scare that prompted her to scrap a show, she's on fire. Carey's next Vegas show is scheduled for Saturday (23May15).