Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Entry Date [A ] | Single | Artist | Peak | Peak Reached [A ] | Weeks in top 10 |
| --- | --- | --- | --- | --- | --- |
| 31 October | " Meet Me Halfway " | The Black Eyed Peas | 1.0 | 21 November | 11.0 |
| 7 November | " Bad Romance " | Lady Gaga | 1.0 | 19 December | 12.0 |
| 5 December | " The Official BBC Children in Need Medley " | Peter Kay | 1.0 | 5 December | 5.0 |
| 5 December | " Russian Roulette " | Rihanna | 3.0 | 12 December | 6.0 |
| 26 December | " The Climb " | Joe McElderry | 1.0 | 26 December | 2.0 |
| 26 December | " Killing In The Name " | Rage Against The Machine | 2.0 | 26 December | 2.0 |
Question:
How long has the longest song spent in the top 10?
Answer:
12.0