Jason Trawick Britney Spears glasses jeans hat Jason Trawick Britney Spears glasses jeans hat

We just caught Britney Spears treating herself to a birthday shopping spree at Fred Segal, and even though she was followed by dozens of photographers, it looks like she's still enjoying her special day!

And since it IS her 28th birthday today, I'm not going to give her a fashion critique for this um, creative outfit, but why didn't anyone tell her that she put her sweater vest on inside out? C'mon guys, that's just cruel!

Last night we spotted Brit and her lover/manager Jason Trawick at the Saddle Ranch, and afterwards the lovebirds hoofed it to the Chateau Marmont, and finally they headed to the Mondrian for a sleepover. Sounds like a birthday celebration fit for a pop princess! Happy b-day Brit Brit!