[*mazedsalv**]

My list:

1. Toxic
2. Im a Slave 4 U
3. Everytime
4. Freakshow
5. You Drive Me Crazy
6. Get Naked
7. Boys
8. Gimme More
9. Overprotected
10. Sometimes

Honorable Mentions- Autumn Goodbye, Toy Soldier, Perfect Lover and My Prerogative.

[Shaun]

Hmmmm.

1; Everytime
2; (You Drive Me) Crazy
3; Gimme More
4; Lucky
5; ...Baby One More Time
6; Sometimes
7; Toxic
8; Oops...I Did It Again
9; Stronger
10; Me Against The Music [ft. Madonna] [only so low because it's a joint-effort.]

[Ross]

1. Lucky
2. Gimme More
3. Piece of Me
4. ...Baby One More Time
5. Everytime
6. Toxic
7. Oops! I Did It A Again
8. I'm Not A Girl, Not Not Yet A Woman
9. Ooh Ooh Baby
10. Break the Ice

[MarkWaldorf]

1. Piece of Me
2. Born To Make You Happy
3. Gimme More
4. Toxic
5. Lonely
6. My Prerogative
7. Outrageous
8. I'm A Slave 4 U
9. Outta This World
10. Stronger

Other mentions: Break The Ice, Ooh Ooh Baby, Oops I Did It Again, The Hook Up, Do Somethin', Everytime, MATM, BOMT, Get Back, WSIBSS and Underground/Mannequin.

[DamonJ]

1. Gimme More
2. What It's Like To Be Me
3. Lonely
4. The Answer
5. My Prerogative
6. Before The Goodbye
7. Break The Ice
8. Hot As Ice
9. Cinderella
10. Over To U Now

... ^ in no particular order

[Callum]

1. Piece of Me
2. I'm Not a Girl, Not Yet a Woman
3. Gimme More
4. Radar
5. Toxic
6. Stronger
7. Get Naked (I Got a Plan)
8. Everytime
9. Me Against the Music
10. Get Back

[Hugo]

1. Oops...I Did It Again
2. Not a Girl, Not Yet a Woman
3. Radar
3. Overprotected
4. Outragous
5. Sometimes
6. Toxic
7. Born to Make You Happy
8. Gimme More
9. ...Baby One More Time
10. Everytime

[Sophii3x]

1. Born To Make You Happy
2. Toxic
3. Everytime
4. Lucky
5. (You Drive Me) Crazy
6. I'm a Slave 4 U
7. Stronger
8. ..Baby One More Time
9. Gimme More
10. Oops!.. I Did It Again