In April 1980, Warner Bros. released "One Eighty", which produced two of the year's biggest hits. The first, "Biggest Part of Me", reached number three for three weeks on the "Billboard" Hot 100 and crossed over to the soul chart, where it peaked at number thirty-five. The second, another blue-eyed soul hit, "You're the Only Woman (You & I)", reached No. 13 on the "Billboard" Hot 100. "One Eighty" earned the band three Grammy nominations, including Best Pop Vocal Group. A headlining world tour followed. For the Japanese leg of the tour, the group was joined by their longtime friend Cliff Woolley (formerly of the Association, who had also guested on "Life Beyond L.A.") on guitar, harmonica and backup vocals.