markzkatyp.jpgCourtesy: Twitter

Uh-oh. Should Russell Brand be worried?

Katy Perry decided to randomly pay the Palo Alto, California Facebook offices a little visit, and stayed to spend some quality time with America's youngest self-made billionaire; the now-legendary Mark Zuckerberg. Jealous!

The I Kissed A Girl singer was busy Tweeting away while checking out the goings on behind The Social Network , and the curvaceous beauty seemed to really enjoy Zuckerberg's company.

The sexy California Gurl Tweeted:

    "Ya know just hangin' @ 'the' facebook with 'the' CEO. Baller style. I like him!"


Definitely baller style.