:: twitter :: 

BRITNEY SPEARS... GOES RETRO-GLAM? 

No, she's not crazy again... but the pop superstar and XFACTOR USA judge is all retro-glammed out in this photo she posted on Twitter, and it's for her new fragrance, called FANTASY TWIST from ELIZABETH ARDEN. 

She's been doing the shoot for two days now. 

Click here for even more thanks to our friends at E!