"This Is It," a song about his father's approaching heart surgery, co-written with Michael McDonald, would become one of Kenny Loggins' biggest hits as a solo artist. It was an instant sports anthem and a definitive distillation of the elements that would make Loggins a household name for the entire 1980s: rock guitars filtered through blue-eyed funk, his talents as a pure singer and an irresistibly catchy chorus that could be played over anything -- closing film credits, TV openings, sporting events. But it's best heard from a car radio with the windows rolled down. Or when doing aerobics.