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Jillian Michaels, Instagram

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We can't get enough of Jillian Michaels' adorable daughter Lukensia!

Lukensia, who was adopted by Jillian in 2012, will be featured on E!'s reality show Just Jillian, which premieres on Jan. 19!

From the preview clips we've seen, it's clear that Lukensia is going to be a total scene-stealer. Jillian herself even revealed that the kids are the stars of the show!

So in celebration of the upcoming premiere of Just Jillian, we wanted to do some research to find out which celebs were adopted at a young age, just like Lukensia!

Click on the gallery to see 15 celebs, like Jamie Foxx and Faith Hill, that you didn't know were adopted!

Watch the series premiere of Just Jillian Tuesday, Jan. 19 at 10 p.m., only on E!