Question: Barcelona is the second solo album recorded by a singer known for his four-octave what?
Sentence (from "Omarion"): His fourth solo album, "Sex Playlist" (2014), spawned the single, "Post to Be", which was certified 3x platinum and reached number 13 on the Hot 100 chart in May 2015, and became his highest charting single to date.
Relevant evidence: No