Mine follows the order the singles were released in:

 

1. Oops I Did It Again

2. Lucky

3. Stronger

4. Don't Let Me Be The Last To Know

results:

 

59 Oops!...I Did It Again

54 Stronger

42 Lucky

19 Don't Let Me Be The Last To Know

 

Not so strong lead for Oops, but still it took top spot!

 

Clear last song as with From The Bottom from Baby!