"O (Oh!)" is a song written by Byron Gay and Arnold Johnson and performed by Ted Lewis and His Band. It reached No. 13 on the U.S. pop chart in 1920.^[1]

• Pee Wee Hunt and His Orchestra released a version of the song which reached No. 3 on the U.S. pop chart in 1953.^[2]

• All-Star Trio released a version of the song as a single in 1920, but it did not chart.^[3]
• Billy Murray released a version of the song as a single in 1920, but it did not chart.^[4]
• Sauter-Finegan Orchestra released a version of the song as the B-side to their 1953 single "The Moon is Blue".^[5]
• Lawrence Welk and His Champagne Music released a version of the song as a single in 1953, but it did not chart.^[6]
• Sy Oliver and His Orchestra released a version of the song as the B-side to their 1959 single "The Touch".^[7]
• Bill Black's Combo released a version of the song on their 1964 album, Bill Black's Combo Goes Big Band.^[8]
• Boots Randolph released a version of the song on his 1973 album, Sentimental Journey.^[9]