I'm a fan of Demi, but that was kinda uncalled for. It's live TV, and I'm sure they were on a tight schedule. Mario was just doing his job, no need to be a b*tch to him. After being on the show for two season, you'd think she'd know that live shows run on a tight schedule
It's live TV, it's the hosts job to make sure that they don't run out of time. Carson is always rushing the judges on the Voice to hurry up and make a decision but it's not because he's being rude, they can't run overtime.
I find it disrespectful that Demi would do that and I LOVE her.
It's Mario's job (as everyone stated before me) - he's the host and if he knows that time is running out, he has to intervene. However, if it was Mariah, Britney, Christina, than that's fine, the show can afford to pay a minute extra.