Saturday Night
Whigfield
Tab By Sam
The other ones are simply wrong.  Interpreted this from the sheet music.

Bass line:  standard tuning  (the timing might be a little off but come on it's my first tab

Bassline:

|--------1-1-1-------1-----------4-4-4------------1|
|--------------4-4-4-------------------4-4-4--4-4--|
|--2-2-2---------------2-2-4-4-4-------------------|
|--------------------------------------------------|

Repeat as many times as you like.