By a Waterfall

Berkeley realized that screen choreography involved the placement and movement of the camera as well as the dancers.

Instead of filming numbers from fixed angles, he set his cameras into motion on custom built booms and monorails and if necessary, cut through the studio roof to get the right shot.

Its walls and floor were glass, and before shooting started 100 chorus girls took two weeks to practice their routines in it.

The actual filming lasted six days and required 20,000 gallons (75,708 liters) of water a minute to be pumped across the set.

[2] The recordings by Guy Lombardo & His Royal Canadians (vocal by Carmen Lombardo), Leo Reisman & His Orchestra (vocal by Arthur Wright) and by Rudy Vallee are assessed by Joel Whitburn as the most popular in 1933.