The usually reserved actress is "naughtier now than she's been in years!". "She is noticeably more fun and open and sassier."The tight two some have been stuck at each other's hip lately and Aniston even had Justin in tow for a recent appearance on Inside the Actor's Studio.They may or may not be moving in together, but things seem to be getting more serious with her motocycle-riding, boots-wearing Wanderlust co-star.She gushes about how she loved her Horrible Bosses role, and how liberating and fun it was to be dirty and push the boundaries of what people expect.As if that weren't enough, Jen has made a permanent change. Her reps confirmed to Life & Style that she got her first tattoo.A raunchy role, some permanent ink and a new attitude. All thanks to her new man, who we can't thank enough ... even if she pulled an Angelina.