Gomez decided to get the roman numerals for the number 76.
"The tattoo was a tribute to a family member who she said means a lot to her. Selena was nervous it might have been painful, so she held her best friend's hand the whole time. But she did a great job," eonline.com quoted Bang Bang as saying.
The 20-year-old singer also tweeted: "You will never know how much you all mean to me."
Gomeaz, who is dating teen sensation Justin Bieber, got her first tattoo, a small heart on her right wrist, February this year, after visiting Hollywood's Under the Gun tattoo shop.