** The Corrs, “In Blue,” 143/Lava/Atlantic.

This Irish quartet may be an international sensation, but why? Its blandly positive fourth collection features decent, sleek singing backed by lightweight, ‘80s- and ‘90s-style pop-rock, “personalized” with fiddle and tin whistle. At least the three Corr sisters and their brother offer a range of moods, from upbeat to wistful to slightly mournful, but these 15 tracks perfectly embody the concept of musical wallpaper.

*

Albums are rated on a scale of one star (poor), two stars (fair), three stars (good) and four stars (excellent). The albums are already released unless otherwise noted.