The 36-year-old actress said she was not feeling too confident about the song just like her co-star James Corden, reported Female First.
"They're like, 'How do you feel about rapping?' I was like, 'Wait, um, I'm sorry I didn't realise that the rap was supposed to be me rapping, I thought that was for somebody else.' Of course it wouldn't be me- I'm not a rapper, now I am...
"Justin Timberlake's there, he's like, 'So you want to take a minute to go over it?' I'm like, hell yes. So I go in the other room and I listened to this rap like 20,000 times and then I went in there and did it," she said.
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