A source said: "Christina is consistently about two hours late. For season three this has got to stop.
“Whatever her fine is now doesn’t bother her. She has so much money she probably doesn’t notice.
“Higher-ups on the show want to raise it to a number that does bother her so she actually arrives on time."
Christina's time management issues are also said to have angered her fellow coaches, Adam Levine, Cee Lo Green and Blake Shelton, who reportedly "can't stand" her lateness.
The source added to RadarOnline: "They can’t stand how late she is. They know she’s a girl and she takes longer to get ready, but this is ridiculous. And when she gets to set she still has to go through hair and makeup.”