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But the showbiz veteran knew just what to do to put the younger singer at ease and mentored her in the same way Streep did when Cher was a nervous newcomer on the set of 1983 drama Silkwood.

She tells movie website Collider.com, "She reminded me of the relationship that I had with Meryl Streep, when Meryl took me under her wing. The truth was that I didn’t have any idea where to stand, not that I know where to stand now. I just learned what downstage and upstage is.

"But, Christina worked so hard. She overcame a lot. She came on the set with us, and that’s a little bit nerve-wracking when you’ve done nothing in film. I tried to put her at ease. As time went by, she felt a lot more comfortable."

Christina Aguilera has revealed Cher greeted her with a warm hug each day and the Believe singer admits she even messed up a scene or two so her co-star could have another opportunity to perform better.