Reese Witherspoon isn't just like any mom; she's a cool mom!

The actress caught up with E! News' Maria Menounosat the star-studded premiere of animated flick Sing, and right by her side was Witherspoon's husband James Toth and her three look-alike children, Ava, 17, Deacon, 13, and Tennessee, 4.

Witherspoon lends her singing voice to a musically-talented pig in the film, a character that she explained might have gotten on her kids' nerves from time to time as she prepped for the role.

"I definitely was singing "Firework" [by Katy Perry] too much," Witherspoon dished to us. "I definitely got like, ‘Mom, stop singing "Firework" and "Shake It Off" all the time.'" LOL!

Ava Phillippe, Reese Witherspoon, Deacon Phillippe, Tennessee James Toth, Jim Toth, Sing Premiere

Todd Williamson/Getty Images

One person who didn't mind belting out Katy and Taylor Swift on the reg? Reese, of course! She explained of filming Sing, "It was just great! It's fun pop songs too, and getting to sing Taylor Swift and getting to sing Katy Perry was challenging. I saw both of them while I was shooting and I was like, ‘I have a new appreciation for how hard you work.'"

And as for all those connections made about Reese and Ava's uncanny resemblance, the star doesn't quite understand the hype. 

"Trust me, we see it a little bit. But it's not the way people talk about it because we're so different. It's just sweet; we're really close," she added.

For more of our interview with Reese, catch the video above!

Sing hits theaters Dec. 21.

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