Jessica Alba and dianna Agron's beautiful celebrity styles made us do a double take this week! We're telling you why in this week's installment of Friday's Fashion Obsessions.

Jessica Alba

I can always count on Jessica Alba to give me some enviable Fashion Week street style to lust over. This week, the actress was spotted on the streets of NYC wearing this drool-worthy outfit I'm tempted to steal for myself this fall.

Sweatshirts and chunky sweaters were a big fall trend on the runways, and as you know, I'm a sucker for a fun fashion juxtaposition. Here, Jess takes the most impossibly cute pink maxi skirt (this is the stuff of princess dreams, folks!) and pairs it with a casual cropped knit. The result? Sheer genius! Jessica finished her look off with some classy sandals and a shiny black bag.

The final verdict? Some of the best outfits are a result of combining different trends. Don't be afraid to mix high with low, menswear with womenswear and casual with dressy. The result can be stunning!

Dianna Agron

Is it just me or has Dianna Agron been looking incredible lately? The star of The Family arrived at the movie's NYC premiere in a super chic black and white combo and continued her fashion streak.

It's amazing what a few tweaks can do to an outfit. Here we have a somewhat similar look worn by the lovely Emma Watson. Emma landed herself on our Fashion Fails list because she fell victim to some tricky fashion mistakes, but Dianna got this look all right! The white flowy top shows just enough midriff without being slutty, and the high-waisted black skirt keeps things a bit modest. Black and cream clear pumps and a few bangles add some pizzazz to this modern-meets-classic ensemble.

The final verdict? Thanks to proper proportions and minimal accessories, Dianna managed to look cool and classic at the same time. And we can't forget that gorgeous makeup. Zoom on in, girls, because you're going to want to steal this look!

Source: Sheknows