According to The Sun, White "threw a strop" because she finished in the bottom two last week.
"Rolando was extremely angry, especially as he chose to save Vanessa last week," said a source. "The bosses warned her to pull her socks up. Since then she's been back in rehearsals but she'll have to put on a great show tonight to prove she's taking the show seriously."
Vanessa Jenkins and Villazon opted to save White over Blur bassist Alex James on last week's programme. Villazon has apparently since claimed that he made the wrong decision.
Popstar To Operastar airs at 9pm tonight on ITV1.