"All Day Long I Dream About Sex" is a song by American recording artist JC Chasez, who rose to stardom as a member of the 1990s boy band NSYNC.

[3] The video features footage of JC performing the song alongside a band and dancers spliced with parodies of adult films.

[3] Radio was reluctant to play the single due to fear of FCC fines relating to the Super Bowl XXXVIII halftime show controversy.

[11] In American reviews, Len Righi of The Morning Call wrote that "All Day Long" "whips New Order and Human League into an electro-pop parfait".

[12] Doug Rule of Metro Weekly wrote that the song has a "fascinating acoustic meets electronica sound and an extended instrumental bridge that glistens with updated '80s synth-pop.