By Mike Moody, US Entertainment Reporter
Christina Aguilera, Cher in on-set feud?
WENN
An on-set feud is reportedly brewing between Burlesque co-stars Christina Aguilera and Cher.
The popstars are sparring because Aguilera feels that she is being upstaged by Cher, reports Showbiz Spy.
"Christina's jealousy is ripping the production apart," said an insider.
The source continued: "The movie contains many musical numbers and while Christina has been great, Cher's come in and knocked them all out of the ballpark."