Austin Mahone – Birthday Gifts & ‘Secret’ Collaboration with Justin Bieber – Y100 Miami Interview by jbz 6/04/2014 | 6:38 5 Posted in News Austin talks about his birthday – turning 18 and collaboration with Justin. via Y100 Miami. Tags:austin mahone, collaboration Related Bieber News Pia Mia Talks New Music + Working With Justin Bieber [VIDEO] Justin Bieber & Austin Mahone tease each other hairstyles on Instagram Justin Bieber & Jack Ü (Skrillex-Diplo) Collaboration to be ‘Record of the Year, DJ Snake says Justin Bieber makes cameo in Pia Mia music video “Fill Me In” ft. Austin Mahone Comments Diana beliber forever 6/04/2014 | 10:55 I hope he had a fun time on his b-day I can’t wait to hear the track Hannah bieber 7/04/2014 | 12:11 Awwww Austin sounds so cute <3 hope he had a good birthday and I can't wait for the song to come out <3 Nicole 7/04/2014 | 9:55 happy Birthday austin i wish u had the best birthday u could ever had in your entire life austin !!! Lailani 7/04/2014 | 10:30 Justin is very sweet to buy Austin shoes for his bday Lailani 7/04/2014 | 10:30 Justin is a just truly amazing guy.