Who's on top when it comes to potential 2012 presidential candidates ... on Twitter?

Turns out that former House Speaker Newt Gingrich has a sizeable edge with more than 1.3 million followers.

Here's a breakdown:  

1. @NewtGingrich (1.3 million followers)
2. @RealDonaldTrump (503,000 followers)
3. @SarahPalinUSA (485,000 followers)
4. @GovMikehuckabee (146,000 followers)
5. @MicheleBachmann (42,000 followers)
6. @repronpaul (41,000 followers)
7. @MittRomney (36,000 followers)
8. @Tim Pawlenty (30,000 followers)
9. @MarcoRubio (28,000 followers)
10. @HaleyBarbour (14,000 followers)
11. @JebBush (12,000 followers)
12. @RickSantorum (6,500 followers)  

Of course, all of them combined are still far behind @BarackObama whose tweeting followers are nearing 7.5 million. 

But, if Twitterland had its say, Lady Gaga might be our new POTUS.

No politician beats neither @ladygaga (9.4 million followers) nor @justinbieber (8.9 million followers).