Led Zeppelin's ninth concert tour of North America, in support of their fifth album Houses of the Holy. On May 5 at Tampa Stadium, they played to 56,800 fans, breaking the single-artist attendance record set by The Beatles at Shea Stadium in 1965. Three sold-out shows at Madison Square Garden in New York City that concluded the tour were filmed for the concert film The Song Remains the Same. The tour grossed over $4 million.