But we were reminded of the star's dirty streak at last night's MTV Movie Awards, where Rachel -- er, Jennifer -- picked up the Best On-Screen Dirtbag Award for her role as a sex-crazed dentist in "Horrible Bosses" (yeah, we'd forgotten about that movie, too).
According to JustJared.com, Aniston accepted her gold popcorn statue (no naked gold men here) with a shout-out to her director: "I would like to say thank you to the television show Friends for letting me unleash my inner sweetheart and [Horrible Bosses director] Seth Gordon for letting me channel my inner dirtbag."
She could've just as easily thanked her stylist. Since getting together with Justin Theroux, Jen's beachy California style has gained a slight rocker edge; consider the transition complete with last night's outfit, a tight black leather minidress by Valentino paired with strappy black Giuseppe Zanotti heels.
Black leather might just be Jen's new signature: she killed it in leather leggings on "The Tonight Show" earlier this year and reportedly purchased Theroux a $12,000 vintage leather jacket once worn by James Dean for his birthday.
We're hoping her teeny Valentino dress didn't cost that much -- there's wasn't that much of it.
Check out Jen's "dirtbag" fashion statement from the 2012 MTV Movie Awards. Are you a fan of the 43-year-old star in this sexy LBD?
See Jen Aniston's style evolution!