East Avenue is the first runner out of the unraced Dance Music (Ghostzapper), a half-sister to Cody's Wish (Curlin), Horse of the Year, a multiple Grade 1 winner and sire. Her other half-brothers include the sire Endorsed (Medaglia D'Oro), winner of the Grade 2 Gulfstream Park Mile S., and the sire Bocephus (Medaglia D'Oro), placed in the Listed Turf Paradise Derby.

Second dam Dance Card (Tapit) won the Grade 1 Gazelle S. in 2012 and was third in the Grade 1 Breeders' Cup Filly & Mare Sprint the following year. She is a half-sister to Tempted To Tapit (Tapit), a dual winner placed in the Grade 2 Risen Star S., and to the twice-placed C Note (Scat Daddy), dam of C My Meister, who won four races and was multiple stakes-placed.

Third dam Tempting Note (Editor's Note) won twice at two and was twice placed at stakes level.

Dance Music has a colt by Hard Spun foaled in 2023 and a filly by Authentic foaled in 2024, and was bred back to Not This Time.