As forecast last week, Miley Cyrus debuts at No. 1 on the Billboard 200 with her new release “Bangerz,” selling 270,000 copies in its first week, according to Nielsen SoundScan. Counting her soundtrack albums as the Disney character Hannah Montana, this is her fifth No. 1 album. She topped the list with the Disney Channel TV series’ first soundtrack in 2006, as well as its big-screen film adaptation soundtrack in 2009. Cyrus herself notched No. 1s with the half-soundtrack/half-studio album “Hannah Montana 2/Meet Miley Cyrus” set in 2007, and then her own “Breakout” studio effort in 2008. Cyrus’ last studio album, 2010’s “Can’t Be Tamed,” debuted and peaked at No. 3 from a 102,000 start.