Mariah Carey‘s strict workout-and-diet plan is selling itself. The singer poured herself into a slinky red gown on Friday night at the Noble Gift Gala at the Dorchester hotel in London. She’s reportedly lost more 70 lbs in the last seven months, which makes her our new hero — although there’s no way we’re warbling that song. Mimi was also the guest of honor at the event and received the 2011 Noble Gift Humanitarian Award for work with helping disadvantaged children. So that’s body and soul taken care of.
[Photos: Getty Images]