Selena Gomez Mom Posts Throwback Video — Showing Support After Justin/ Hailey Engagement? When Selena Gomez got back together with Justin Bieber in Oct. of 2017, her mom Mandy Teefey was not at all supportive of the reunion. The 24-year-old singer had broken her daughter’s heart so many times and caused her so much drama that it caused a family rift. Now that the Biebs is engaged to Hailey Baldwin, 21, Sel’s mom is showing her daughter massive support by posting a never before seen video of the 25-year-old as a strong-willed little girl. SelGo is seen talking tough on the phone and being super sassy about what her teacher assigned her on her first day of school in 1997. Selena would have been only four at the time and boy does she let her feelings rip! Like Share And Subscribe!!