Taylor Momsen, former Gossip Girl starlet and current rocker for The Pretty Reckless, temporarily traded in her usual lace-and-leather for well, just lace.

The occasion? The Marchesa Fall/Winter 2012 show at New York Fashion Week.

The 18-year-old singer rocked a beautiful lace dress, courtesy of Marchesa, and added a bit of glam to her hair with a sophisticated up-do.

It was f**king - excuse me . . . I twas beautiful, it was gorgeous . . . there were so many [designs] I loved, Momsen told E! News of the Marchesa show on Wednesday.

Petra Nemcova, Bar Refaeli, Stacy Kiebler and Channing Tatum's wife, Jenna Dewan, were among the famous faces on hand for the new collection.

Momsen has been sticking to music since quitting Gossip Girl last summer. Her band, The Pretty Reckless, is gearing up for The Medicine Tour, which will take the group all over the U.S., Canada, Argentina, Chile and Brazil.

On Thursday, The Pretty Reckless released the music video for their new single, You (see below).

Congratulations @MarchesaFashion on the amazing show! Loved the new collection! Momsen wrote on Twitter on Thursday.

Click through for photos of Taylor Momsen from the Marchesa Fall/Winter 2012 show at New York Fashion week, as well as her previous stylish looks.