The 30-year-old 'X Factor' judge shared a second snapshot on Twitter showing her wearing heavy makeup, a sequined headdress and a bejeweled, cleavage-baring dress, reported Us magazine.
Spears said she was "loving day two of my Elizabeth Arden Fantasy Twist fragrance shoot."
She added that her fiance, Jason Trawick, said she looked "like Jean Harlow!"
It's not the first time Spears has gone back in time for an ad. After signing a USD 9 million Pepsi contract more than a decade ago, Spears shot a commercial that featured her travelling each decade beginning in 1958 and ending in 2001.
