Hasta La Motion!

Hey there just want to ask you guys since I am thinking of moving to the states or canada to study and effectively work over there…is the salary hourly based or salary based there? Does this mean if u work with a hourly salary for 8 hours and OT for extra 8 hours, do you get the OT salary of 8 hours? If you work on weekends, are you also paid extra for the OT? Or is it all sorts of OT hours put in is not paid but you are just paid by a basic salary package? Thanks. Much appreciated if I can know this.