“You thought "Chillin' by the fire while we eatin' fondue" was the most sublimely ridiculous lyric in pop history when Justin Bieber rapped it? Wait until you hear him sing it, in a love-man croon, over delicately brushed bossa-nova-style guitar. The latest offering from the Bieber Industrial Complex, featuring eight sotto voce acoustic renditions of songs from Believe, is worth it for that "Boyfri”