heat is on it's a saturday night

heat is on it's a saturday night It's Saturday night It's a Saturday night和It's Saturday night有什么区别? It's Saturday Night 歌词 when is it?saturday night On A Saturday Night 歌词 (Dancing On A) Saturday Night 歌词 Texas On A Saturday Night 歌词 tomorrow is saturday,It's( ). at Saturday night or on saturday night it is saturday on your birthday造句 i had a wonderful t___ on saturday night