the success of their chart-topping "I Get Around" single, the Beach Boys' touring schedule became considerably more busy. From June to August, the group toured in support of their newest LP, All Summer Long, which had marked the most complex arrangements on a Beach Boys record to date, as well as being the first that was not focused on themes of cars or surfing. They also readied a Christmas album for release in November. By the end of the year, they had released four albums in 12 months and additionally recorded the singles "When I Grow Up (To Be a Man)" and "Dance, Dance, Dance". In November, they toured the UK and mainland Europe for the first time, appearing on various television programs and playing shows. By this point, principal songwriter Brian Wilson had become overwhelmed by the increasing pressures of his career and personal life. He later explained, "I used to be Mr Everything ... I was run down mentally and emotionally because I was running around, jumping on jets from one city to another on one-night stands, also producing, writing, arranging, singing, planning, teaching – to the point where I had no peace of mind and no chance to actually sit down and think or even rest." Adding to his concerns was the group's "business operations" and the quality of their records, which he believed suffered from this arrangement. During the European tour, frontman and lyricist Mike Love told Melody Maker that he and the band wished to move on from surf music and avoid resting on the band's laurels. Wilson was also wracked with anxiety over his relationship with 16-year-old singer Marilyn Rovell. During the group's tour of Europe, he began consuming alcohol more frequently than he ever had, and channeled his feelings into writing songs. On December 7, in an effort to bring himself more emotional stability, he impulsively married Rovell. Around this time, he was introduced to marijuana by a new acquaintance from the music industry, Loren Schwartz. Wilson's habitual use of the drug caused a rift between himself and Rovell. On December 23, Wilson was to accompany his bandmates on a two-week US tour, but while on a flight from Los Angeles to Houston, began sobbing uncontrollably over his marriage and suffered a nervous breakdown. Al Jardine, who had sat next to Wilson on the plane, later said, "None of us had ever witnessed