Tattoo No. 11: Are these Roman numerals Bieber's latest way to honor his family -- or a big boo-boo? When Bieber debuted this new chest piece in January 2013, fans were left scratching their heads. Some guessed it was the birth year of his mom Pattie Mallette or dad Jeremy Bieber. But the symbols “I, IX, VII and V” would translate to 1, 9, 7 and 5 -- and that’s not how you write 1975 in Roman numerals (that would be MCMLXXV).