Taylor Momsen Launches Madonna's Material Girl Fashion Line in New .

Taylor Momsen went from "Gossip Girl" to rock singer, and now she can add fashion model to her resume.

Momsen - who is spending her summer on the Vans Warped Tour fronting her band, the Pretty Reckless - stopped by Macy's Herald Square in New York yesterday (Aug. 3) to establish the new Material Girl clothing line, designed by Mary and her daughter Lourdes "Lola" Leon.

Momsen told Billboard.

om that signing on to be Material Girl was an easy decision. "It's Madonna - she doesn't actually do anything wrong, ever," the 17-year-old said in her dressing room, while a bunch of girls waited upstairs for her to perform. "So I had some faith there, and I saw the appeal and it's really, really great.

"It's really much based on mixing and putting pieces together which I really like because that's what I do instead of pre-designed looks," added Momsen, who was styled by Lourdes for the Material Girl ad campaign. "She sort of reminded me of my little baby in a way. She was a real sweet girl, and [she has] great fashion sense."

The Pretty Reckless: Summer Album Preview

A peek at the album art of the Pretty Reckless' upcoming debut album, "Light Me Up," suggests that Momsen has ever been a style maven. The album, due Aug. 31 on Interscope, features a blonde toddler sporting a blank T-shirt, leather cap and a lighter.

"The thought came from an old picture of me," says Momsen. "I was seated on a baby motorcycle, with a leather cap and sunglasses on when I was like 2 years old. The motif came from that."

Although she ruined her stint on the CW's "Gossip Girl" after its 3rd season, Momsen is not one to shy away from drama. The picture for Pretty Reckless new single, "Miss Nothing," has the singer posing as Mary Magdalene - in aught but form-fitting silver lingerie and spike heels - in a "Last Supper"-inspired set.

"It seemed fitting for the song - the call is nearly a lover dying," Momsen explained. "It's Jesus's last supper, and [Mary Magdalene] can't survive without him."

The Pretty Reckless have tour dates lined up through Aug. 22, and Momsen has likewise been tapped as the look of John Galiano's perfume, set to establish this fall.