Source: Justin Timberlake "Absolutely Obsessed" With Mila Kunis

Entertainment Sep. 16, 2010 AT 12:29PM

Is life about to imitate art on the set of Friends With Benefits? Justin Timberlake is falling for Mila Kunis, his sexy costar on the currently-shooting flick, multiple insiders tell Us. "He is absolutely obsessed with Mila," a pal says. Adds another: "He's smitten!"

PHOTOS: Justin Timberlake's many women

Find out how Timberlake could stray -- again -- from longtime love Jessica Biel in this week's Hot Stuff video.

The roundup -- hosted by Senior Editor Ian Drew and his beautiful mom, Susan! -- also dishes on the escalating romance between Kate Hudson and rocker Matt Bellamy (he's ready to get married!), Justin Bieber's "hard" crush on Selena Gomez and more.

PHOTOS: Celebs who found love on set

Catch up on all the scoops -- watch the video now (above)!

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