Just realised who she is...

When I clicked on the imdb page for "How the Grinch stole Christmas" (my fav christmas movie 4 ever) I couldn't stop myself wondering what happened to the girl that portrayed Cindy Lou and clicked on her profile.....and what do I find ? She portrayed the onliest character on Gossip Girl that I considered actually hot and is the lead singer of the Pretty Reckless ? What else did I miss ?