Actress-turned-singer? Not exactly, says Taylor Momsen.

“I’ve been singing longer than I’ve been acting,” Momsen reveals. The Gossip Girl star performed on Saturday with her band, The Pretty Reckless, at 97 BHT’s Summer Jam 2009. “I’ve been writing music my entire life. I know people aren’t going to know that instantly, but yunno, it all takes time.”

And time is on the side of the 15 year-old. Season 3 of Gossip Girl enters production in July. So for the next month, she’ll tour, opening up for The Veronicas. When Momsen returns to New York City and the set, she’ll also return to the studio, to finish production on The Pretty Reckless’ first LP. No timeline or dates are set, but Momsen already wrote the entire record.

Now she’s cutting her chops live, on stage. And it’s a learning process. 97 BHT’s event brought forth yet another lesson.

“Never again with no soundcheck!” said Momsen. “The entire first song, you couldn’t hear vocal at all.” The lead singer didn’t throw a fit nor storm off stage, instead rolling with the punches as sound techs worked out the issues.

The theater tour circuit certainly differs from the network sitcom set. It also seems that the average fan of The Pretty Reckless’ songs could differ from the average Gossip Girl enthusiast. So will fans of Jenny Humphrey buy in to Taylor’s music?

“I think it’s gonna take some getting used to,” she admits. “It might be a little bit of shell shock ‘cause, it’s rock man. It’s not lite, and it’s really real.”

But Gossip Girl viewers will probably see season 3 before they hear any studio material from Momsen. Now that “Little J” is the queen, the actress wouldn’t mind Humphrey become more active.

”It’s gonna be interesting to see what they do with her character as queen with all this power,” said Momsen. “I’d like to see her shake it up a little bit.”