The sales for Justin Bieber's third full-length studio album Believe are starting strong. In fact it looks like he's easily on target for his personal best sales week as well as the biggest debut sales week of 2012 so far. Early estimations are that Believe will sell between 400,000 and 500,000 copies in its opening frame. Justin Bieber's previous best was 291,000 for the second week of My World 2.0 The biggest opening week this year so far is 359,000 copies of Madonna's album MDNA. Any way you put it together Believe is starting out strong. The album looks guaranteed to be Justin Bieber's fourth trip to #1 on the Billboard album chart.