CHRIS BROWN COMPLETES HEAD TATTOO..

Chris Brown's decided one ridiculously large tattoo on his cabeza isn't enough -- unveiling the sequel to his Greek/Roman goddess ink, but this time his inspiration seems more obvious.

CB got a big ole bull inked right next to the Venus de Milo(ish?) chick he got the other day, and captioned his Instagram ... "I do what the f**k I want!"


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