Baylor Chi O's had this really cute one: You have to see all the hand movements and decorations, and the rest of the skit to appreciate how adorable this is!!!

Chi Omega choo choo, Chi Omega choo choo, Chi Omega choo choo, one for you. THen they do it backwards......choo choo Omega Chi, choo choo Omega Chi, choo choo Omega Chi, you for one!!!! they had this whole train type theme, super cute. It's kinda hard to explain, but it's stuck in my head, five years later!!!!