Justin Bieber is helping fans count down to the highly-anticipated release of his next movie by unveiling a new song every week for the next 10 weeks. The pop superstar has announced that he will share his new single, Heartbreaker, at midnight on Sunday (06Oct13) to launch what he's dubbed "#MusicMondays". Taking to Twitter.com, he writes, "Sunday Midnight heartbreaker MusicMondays 10weeks (sic). "MusicMondays is about to begin - SO MUCH LOVE FOR THE FANS...you are always there for me and I will always be there for you. MUCH LOVE. thanks". Bieber, who previously teased fans with a snippet of Heartbreaker in July (13), is set to release a follow-up to 2011's Never Say Never concert documentary movie in time for the Christmas (Dec13) holidays, although few details about the project, which documents the making of his Believe album, have been revealed to date.