Céline Dion may be best known these days as a Vegas residency legend and walking meme for living one's best life, but the "My Heart Will Go On" singer doesn't always sing about love. The singer's 2007 work "Skies of L.A." planted a flag for environmentalism by tackling air pollution. The song from Dion's album Taking Chances was written by the Tricky Stewart and The Dream and features a protagonist looking at Los Angeles' fog-filled skies and lamenting, "I don't know if tomorrow has a day / I don't know if the rays will shine my way again." Buy it here. — Aaron Brophy