First recorded by Vaughn De Leath (1927).
Popular recordings by Ben Selvin (US #1 1927), Al Jolson (1927, in The Jazz Singer), Benny Goodman (1935), Count Basie & His Orchestra (US #8 1946), Bing Crosby (1946), Willie Nelson (MOR #32/C&W #1/CAN #1 1978).
Inspired Theolonious Monk “In Walked Bud” (1947).
From the wiki: “‘Blue Skies’ was composed by Irving Berlin in 1926 as a last-minute addition to the Rodgers and Hart musical Betsy. Although the show ran for 39 performances only, the song was an instant success, with audiences on opening night demanding 24 encores of the piece from star Belle Baker. During the final repetition, Ms. Baker forgot her lyrics, prompting Berlin to sing them from his seat in the front row.