Credit: CPA, PacificCoastNews.com, DJDM / WENN.com Photo: JWOWW's Halloween Costume in 2011 and 2012

Whether it's Halloween or not, JWOWW usually struts her stuff in barely-there outfits, so we did a double take when we saw her covering up in a collared shirt, suspenders, and glasses for a Vegas Halloween party this weekend. 

The Jersey Shore star was seen hosting the spooky bash at the Chateau Nightclub & Gardens in Las Vegas, wearing a G-Rated nerd outfit (right) — quite the opposite from her cleavage-baring gangster moll costume (left) that she wore last year at the same venue.

So which costume do you prefer for this newly engaged guidette? Her innocent geeky getup, or her va-va-voom gangster style from last year? Let us know in the reaction buttons below.

Catch the next new episode of Jersey Shore on Thursday, November 1 at 10 p.m. ET/PT on MTV.

Follow Alissa Kombert on Twitter @AyeKayArt.

For more on Jersey Shore, Follow us on Twitter and Like us on Facebook.