45

A type of gramophone record classified by its revolution speed of 45 revolutions per minute (rpm)
Included in the title of "45 and Fat", a 1996 song by Babybird
The title of a 2002 song by Elvis Costello, "45", both referring to the 45 rpm singles and to the artist's age when he wrote the song, which was released when he was 47.
The title of a 2004 song by Shinedown, "45" see 45 (song)
The title of a 2007 song by Ryan Shaw, "Do the 45"
The title of a 2007 song by The Saturday Knights, "45"


Seems like 45 is a popular number in music!!