The album, her eighth, debuted at number four on the Billboard 200 chart on Wednesday and the sale figure is much less compared to her previous album, 2011's 'Femme Fatale' that sold 276,000 units, reported the Wrap.
Spears has not been doing much promotion - and hasn't performed live on TV yet - which may have drummed up anticipation of her newest offering.
The singer is busy preparing for her upcoming concert residency at Planet Hollywood in Las Vegas, which kickstars on December 27.