War, 'Why Can't We Be Friends?' (1975)
The genre-spanning multi-cultural funk pioneers War made their name with two albums that featured former Animals singer Eric Burdon, most notably on the single "Spill the Wine." The group continued to expand its sound after he departed, even topping the charts with their fifth album, 1972's The World Is a Ghetto. Their seventh LP, Why Can't We Be Friends, is best known for the giddy title track and the hot-rod anthem "Low Rider," but there's plenty more to love amongst its nine cuts. There's the disco-funk of "Smile Happy," the mellow psych-jazz of "In Mazatlan," and the sprawling "Leroy's Latin Lament Medley." Of course, that's not to say the title track isn't deserving of most of the praise. The soulful reggae sing-along that's mostly repeats the phrase "Why Can't We Be Friends?" in between inspiring couplets, surely helped propel the LP to the top of the R&B chart, the last time War would earn that honor.