"C U Next Tuesday" (alternate title is registered as "Cunxtuesday" & "Cunextuesday", known as "CUNext Tuesday" on Animal) is a song released by Ke$ha. It serves as the eighth track on Ke$ha's debut extended play Cannibal. A demo version of the track was released on the Japanese edition of Ke$ha's debut album Animal under the title "CUNext Tuesday."
- Cannibal version - 3:45
- Animal version - 3:54
- Red lipstick is also mentioned in "Red Lipstick."