Christina Aguilera gets fined for being "consistently about two hours late" to the set of The Voice.

Bosses of the NBC series are now looking to increase the undisclosed amount the 31-year-old singer - who is a coach on the talent show - is required to pay for her poor punctuality in the hope that the financial hit "bothers her" and inspires her to turn up on set at the correct time during the third season.

"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," a source said.

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. "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," the source said.