"arched" back. It's clearly her way of saying she and Lil Wayne are still a thing. Most girls post pics where they are all hugged up with their boyfriends at new years. Christina on the other hand, had to settle for a pic where she's just about viewable in the background, while Wayne happily poses it up with his boys.
Is he done being seen out with her publicly? I haven't seen any paparazzi shots in a while. The thrill must have run its course or... Nivea must have gotten in his ear about how bad this all looks. I had high hopes for this chick. I really did. Just so you know, her E! reality show 'Christina Milian Turned Up' premieres January 18th.