The British soul sensation sports a sparkler on her left hand. Plus: Britney Spears, Tom Cruise, Halle Berry and more

ROCK STAR

British soul sensation Joss Stone sports a huge diamond ring on her left hand during a performance on the Today show Friday. Despite rumors to the contrary, the 18-year-old singer's rep tells PEOPLE that reports of an engagement to songwriter Beau Dozier, her boyfriend of almost a year, are untrue.