Gossip Girl star and aspiring rock star Taylor Momsen turns 17 today.

Yes, still underage ... and she could not give a f*%k what you think!

The brash youngster has always been a bit of a lightning rod for controversy, but has really gone haywire in recent weeks, instigating a feud with Miley Cyrus.

Going out of her way to bash the pop star and Disney genre, Momsen made it clear that she speaks her immature mind and doesn't mind burning bridges.

There's also a separate buzz brewing over her racy new music video and whether any 16-year-old with a sense of decency should writhe around like that.

Hey, at least she's 17 now! Happy birthday, Taylor!