Well, everyone knows he can't sing really, he's just getting all the chick votes. Christina is just feeding the screaming littles girls because she knows it's the only way she's going to keep him in the show since his voice alone won't do it. Eventually though, Dez will get voted off.
While I think she's adorable and I'd definitely hit it, Cassadee Pope still manages to sound like she's singing in her band (Hey Monday)towards the end of all her songs. Good singer but that rocker is just ingrained in her I think.