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We all know that Reese Witherspoon has some major vocal chops.

Not only did she win an Oscar for her work as June Carter Cash in Walk the Line, but she now stars in Sing as a pig who dreams of singing on stage.

So when I caught up with Witherspoon and some of her Sing co-stars the other day, I had to ask them all about their music faves and more.

Make sure to watch the video above to see Reese gave me an impromptu performance of—get ready for it!—"Juju On That Beat." There's a very adorable reason behind it, too.

She also revealed that her first concert she went to was Elton John and most recently she was at the Hollywood Bowl over the summer to see her idol Dolly Parton.

And what song does she love to sing in the shower? Sia's "Chandelier."

Matthew McConaughey recalled his first concert—heavy metal rock group Ratt. And why aren't we at all surprised that his last concert he took in was Fleetwood Mac?

Tori Kelly and Taron Egerton got in on the fun, too.

The Kingsman: The Secret Service actor's go-to shower song? Oh, watch the video. It's just too fun hearing him answer the question.

Sing

Universal

And if Kelly covers Gwen Stefani hits from time to time, we now know why. The "Nobody Love" singer's birthday celebrations when she turned 12 included going to a Stefani concert with her friends.

We promise that Sing is your next favorite animated movie. The soundtrack is chock full of pop music's biggest hits sung by the four mentioned above as well as Jennifer Hudson, Scarlett Johansson, Seth MacFarlane, John C. Reilly, Nick Kroll, Nick Offerman and more.

When the movie premiered at the Toronto International Film Festival in September, Witherspoon told me she offered her apologies to Katy Perry andTaylor Swift for her performances of "Firework" and "Shake It Off."

"I saw them and said, 'Please don't hold it against me because I did the best I could,'" the Wild star said. "I was like, 'I have really a lot of respect for how hard you girls work.'"

No need to be sorry, Ms. Witherspoon—your singing is absolutely fab.

Sing is in theaters on Dec. 21.

E! News and Universal Pictures are both members of the NBCUniversal family.