Taylor Momsen Style: Rocker Trades Grunge for Marchesa [PHOTOS]

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.

Actress and musician Taylor Momsen attends the Marchesa Fall/Winter 2012 collection during New York Fashion Week February 15, 2012.

Actress and musician Taylor Momsen (R) poses for a picture with an unidentified person after she attended the Marchesa Fall/Winter 2012 collection during New York Fashion Week February 15, 2012.

Actress and musician Taylor Momsen attends the Marchesa Fall/Winter 2012 collection during New York Fashion Week Feb. 15, 2012.

Actress Taylor Momsen (C) stands with designer Son Jung Wan at the Concept Korea Fall/Winter 2012 presentation during New York Fashion Week February 10, 2012.

Taylor Momsen

Taylor Momsen

Taylor Momsen (L) and Sebastian Bach speak on stage to present the Best Vocalist award at the 3rd annual Golden Gods awards in Los Angeles April 20, 2011.

Actress Taylor Momsen poses at the 2011 Nickelodeon Kids Choice Awards in Los Angeles,California April 2, 2011.

Singer Taylor Momsen poses backstage at the MTV Europe Music Awards 2010 in Madrid November 7, 2010