Here's my attempt to write down the Bass Tabs for "We Are The 
Champions" by Queen.
       
[Verse 1]
       *.. *..
G|-------+----
D|-6:----|----
A|-8:----|----
E|-------+----

*..  *  .  .  
--+----12-12-1
--|-----------
--|-----------
--+-----------

*  .  .    * .
0-------+-----
--13-8--|-10--
--------|-----
--------+-----

 . * . .  *  .
-------+----12
-------|------
-------|------
-------+------

  .  *  .  .
-12-12-12-12|
------------|
------------|
------------|
      
    * . . * . 
G|------------
D|-10---------
A|------------
E|------------

. *..*.. *..*.
+------+------
|------|------
|------|------
+------+------

. * . . * . . 
+----------7-+
|--------8---|
|------------|
+------------+

  * . . * . . 
-8-----------+
-------------|
-------------|
-------------+

 * . . * . .  
-----------|
-----------|
-----------|
-----------|
    
    * . . * . 
G|------------
D|------------
A|-6----------
E|------------

. *..*..  * . 
+---8---+-----
|-------|-----
|-------|-6---
+-------+-----

. * . .  * . .
-------+------
-------|------
--5----|-3----
-------+------

 * . .  * . . 
-2----+-------
------|-------
------|-1-----
------+-------

* ..  *..*..                
----+------|
----|------|
----|------|
----+------|
    
[Chorus]  
    *.. * . . 
G|-----5----+-
D|----------|-
A|----------|-
E|----------+-

 * . . * . .  
------------+-
3---------5-|-
------------|-
------------+-

 * . . * . .  
------------+-
7---------7-|-
------------|-
------------+-

 * . . * . .  
------------+-
O-----------|-
--------3-1-|-
------------+-

 * . . * . .      
-----------|
-----------|
1-----3----|
-----------|
        
    * ..*..  *
G|--------+---
D|--------|---
A|--------|-O-
E|-1------+---

 . . * . .   *
----------+---
----------|---
--------O-|-1-
----------+---

 . . * . .   *
----------+---
----------|---
------O---|---
--------3-+-2-

 ..*..  *.. *.
-----+--------
-----|--------
-----|--------
-----+-3------

.  *.. *..         
+----------| 
|----------|
|----------|
+-3--------|
     
    * . . * . 
G|------------
D|------------
A|-1---------1
E|------------

.   *.. *..   
-+---------+--
-|---------|--
-|-1---3---|--
-+---------+-1

*.. *..  *.. *
------+-------
------|-----3-
------|-------
------+-3-----

 . .   *.. * .
----+---------
O---|-----3-O-
--3-|---------
----+-4-------

 .    
--|
--|
3-|
--| 
     
    *.. * . . 
G|-----------+
D|-----3-O---|
A|-1-------3-|
E|-----------+

  * . . *..   
-----------+--
-----------|--
-3-3-------|--
-----------+-1

*.. *..
------|
------|
------| 5 bars rest.....
------|   
        
[Verse #2]
    * . . *.. 
G|----------+-
D|-10-------|-
A|----------|-
E|----------+-

 *.. *..  *.. 
-------+------
-------|------
-------|------
-------+-8----

*..  *.. *..  
--+--------+--
--|--------|-1
--|--------|--
--+--------+--

* . . *..  *..
--------+-----
0-------|-----
--------|-----
--------+-----

 *.. *.. *.. 
---+-------|
---|-------|
---|-------|
---|-------|
        
    *.. * . . 
G|---------7-+
D|-------8---|
A|-----------|
E|-----------+

  *.. *..  *..
-8------+-----
--------|-----
--------|-6---
--------+-----

 * . .   *.. *
8---8-+-----8-
------|-------
------|-6-----
------+-------

 . .   *.. *..
8-8-+---------
----|---------
----|-6-------
----+---------

   *.. *..         
+----------|
|----------|
|-6---5----|
+----------|
        
    *.. *..  *
G|-----2--+---
D|--------|---
A|-3------|---
E|--------|-1-

.. *..      
-----|
-----|
-----|
-----|
     
[Chorus x2]