VIDEO : Mariah Carey's 35-Carat Engagement Steals the Spotlight at Concert

Today Your source for all things celebrity and entertainment. Mariah Carey is typically dripping in diamonds, but there's one stone in particular the singer's fans have on their minds. The 45-year-old star returned to her Las Vegas residency stage at The Colosseum at Caesars Palace Tuesday night to serenade her fans with a lineup of her career classics. However, there was just one particular note she had to hit on before she moved the show along?that shiny new rock taking up prime real estate on her left hand.