Whoa, what! Not that this is completely surprising, but still...

Gossip Girl regular Taylor Momsen - who plays the all grown up "Little J" - will begin an "indefinite hiatus" following next week's episode, reports Deadline.

Momsen has only appeared in three episodes this fall and will be MIA for "at least four episodes" beginning with GG's midseason finale on December 6th.

No comment from Warner Bros. or The CW, but the Pretty Reckless singer has caused problems on set in the past and her offscreen antics, including a verbal war against Miley Cyrus, has raised eyebrows.

After guest starring on a recent episode, Tim Gunn even called Momsen a "diva" and "a brat."

Sure, this could purely be about creative reasons... but is it, really?